OpenCalculator
def read_input(): with open('input.txt', 'r') as input: s = input.readline() n = input.readline() return s, n def write_output(ans): with open('output.txt', 'w') as output: output.write(str(ans)) def solution(s,n): ans = 0 num, digs = set(), set() digs.update([int(x) for x in s.split(' ')]) num.update([int(x) for x in n]) ans = [x for x in num - digs] return len(ans) s, n = read_input() ans = solution(s, n) write_output(ans)