#!/usr/bin/env python

def intersect(a, b):
    return list(set(a) & set(b))

def main():
    a = [1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89]
    b = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]
    print(intersect(a, b))

main()