##Example 1

if col=="a" or col=="c" or col=="e" or col=="g":
    if row%2==0:
        print("That square is white.")
    else: 
	    print("That square is black.")
elif col=="b" or col=="d" or col=="f" or col=="h":
    if row%2==1:
        print("That square is white.")
    else: 
	    print("That square is black.")
else:
    print("not valid")



#########################

##Example 2

row = input("What row? ")
column = input("What column? ")

if row=="1" and column=="b" or row=="1" and column=="d" or row=="1" and column=="f" or row=="1" and column=="h":
    print("That square is white.")
elif row=="2" and column=="a" or row=="2" and column=="c" or row=="2" and column=="e" or row=="2" and column=="g":
    print("That square is white.")
elif row=="3" and column=="b" or row=="3" and column=="d" or row=="3" and column=="f" or row=="3" and column=="h":
    print("That square is white.")
elif row=="4" and column=="a" or row=="4" and column=="c" or row=="4" and column=="e" or row=="4" and column=="g":
    print("That square is white.")
elif row=="5" and column=="b" or row=="5" and column=="d" or row=="5" and column=="f" or row=="5" and column=="h":
    print("That square is white.")
elif row=="6" and column=="a" or row=="6" and column=="e" or row=="6" and column=="e" or row=="6" and column=="g":
    print("That square is white.")
elif row=="7" and column=="b" or row=="7" and column=="d" or row=="7" and column=="f" or row=="7" and column=="h":
    print("That square is white.")
elif row=="8" and column=="a" or row=="8" and column=="e" or row=="8" and column=="e" or row=="8" and column=="g":
    print("That square is white.")
else:
    print("That square is black.")


#########################

##Example 3

num = int(input("What row? "))

let = str(input("What column? "))

if (num % 2 == 1 and (let == "a" or let == "c" or let == "e" or let == "g")) or (num % 2 ==0 and (let == "b" or let == "d" or let == "f" or let == "h")):
    print("That square is black")
else:
    print("That square is white")
	
	
#########################

##Example 4

row=int(input("What row is the square in?"))
column= input("What column is the square in?")

if column == "a":
    if row == 1:
        print("The square is black.")
    elif row== 2:
        print("The square is white.")
    elif row == 3:
        print("The square is black.")
    elif row== 4:
        print("The square is white.")
    elif row == 5:
        print("The square is black.")
    elif row== 6:
        print("The square is white.")
    elif row == 7:
        print("The square is black.")
    elif row== 8:
        print("The square is white.")
elif column == "b":
    if row== 1:
        print("The square is white.")
    elif row == 2:
        print("The square is black.")
    elif row== 3:
        print("The square is white.")
    elif row == 4:
        print("The square is black.")
    elif row== 5:
        print("The square is white.")
    elif row == 6:
        print("The square is black.")
    elif row== 7:
        print("The square is white.")
    elif row == 8:
        print("The square is black.")
elif column == "c":
    if row == 1:
        print("The square is black.")
    elif row== 2:
        print("The square is white.")
    elif row == 3:
        print("The square is black.")
    elif row== 4:
        print("The square is white.")
    elif row == 5:
        print("The square is black.")
    elif row== 6:
        print("The square is white.")
    elif row == 7:
        print("The square is black.")
    elif row== 8:
        print("The square is white.")
elif column == "d":
    if row== 1:
        print("The square is white.")
    elif row == 2:
        print("The square is black.")
    elif row== 3:
        print("The square is white.")
    elif row == 4:
        print("The square is black.")
    elif row== 5:
        print("The square is white.")
    elif row == 6:
        print("The square is black.")
    elif row== 7:
        print("The square is white.")
    elif row == 8:
        print("The square is black.")
elif column == "e":
    if row == 1:
        print("The square is black.")
    elif row== 2:
        print("The square is white.")
    elif row == 3:
        print("The square is black.")
    elif row== 4:
        print("The square is white.")
    elif row == 5:
        print("The square is black.")
    elif row== 6:
        print("The square is white.")
    elif row == 7:
        print("The square is black.")
    elif row== 8:
        print("The square is white.")
elif column == "f":
    if row== 1:
        print("The square is white.")
    elif row == 2:
        print("The square is black.")
    elif row== 3:
        print("The square is white.")
    elif row == 4:
        print("The square is black.")
    elif row== 5:
        print("The square is white.")
    elif row == 6:
        print("The square is black.")
    elif row== 7:
        print("The square is white.")
    elif row == 8:
        print("The square is black.")
elif column == "g":
    if row == 1:
        print("The square is black.")
    elif row== 2:
        print("The square is white.")
    elif row == 3:
        print("The square is black.")
    elif row== 4:
        print("The square is white.")
    elif row == 5:
        print("The square is black.")
    elif row== 6:
        print("The square is white.")
    elif row == 7:
        print("The square is black.")
    elif row== 8:
        print("The square is white.")
elif column == "h":
    if row== 1:
        print("The square is white.")
    elif row == 2:
        print("The square is black.")
    elif row== 3:
        print("The square is white.")
    elif row == 4:
        print("The square is black.")
    elif row== 5:
        print("The square is white.")
    elif row == 6:
        print("The square is black.")
    elif row== 7:
        print("The square is white.")
    elif row == 8:
        print("The square is black.")