I don't know what is wrong. I tells me I have a string formatting error where a = y % 19 and then it also tells me I have something wrong with the module when I am calling the main(). No clue on how to fix this because it seems I am calling the main() function correctly and the string seems fine.

def main():

    y = input("Enter year: ")
    print ("y = ", y)

    a = y % 19
    print ("a = ", a)

    b = y / 100
    print ("b = ", b)

    c = y % 100
    print ("c = ", c)

    d = b / 4
    print ("d = ", d)

    e = b % 4
    print ("e = ", e)

    g = (8 * b + 13) / 25
    print ("g = ", g)

    h = (19 * a + b - d - g + 15) / 30
    print ("h = ", h)

    j = c / 4
    print ("j = ", j)

    k = c % 4
    print ("k = ", k)

    m = (a + 11 * h) / 319
    print ("m = ", m)

    r = (2 * e + 2 * j - k - h + m + 32)  % 7
    print ("r = ", r)

    n = (h - m + r + 90) / 25
    print ("n = ", n)

    p = (h - m + r + n + 19) % 32
    print ("p = ", p)

    print ("In ", y, "Easter Sunday is on", p,)
    if (n == 3):
        print ("March")
    if (n == 4):
        print ("April")

main()