y = 0
while y == 0 :
    y = int( input( "Enter a year: " ))
    if y % 4 == 0 :
        print( "The year", y, "is a leap year" )
    if y % 400 == 0 :
        print( "The year", y, "is a leap year" )
    elif y % 4 != 0 :
        print( "The year", y, "is not a leap year" )