adventofcode2020/day6b.py

def checkLists(a, grp):
    for line in grp:
        if a not in line:
            return False
    return True

def main():
    with open("input6.txt") as file:
        text = file.read()
    groups = text.split("\n\n")
    print(f"I have {len(groups)} groups.")
    count = 0
    for grp in groups:
        lgrp = grp.split("\n")
        sgrp = set(grp.replace("\n", ""))
        for letter in sgrp:
            if checkLists(letter, lgrp):
                count += 1
    print(f"The total is {count}.")

if __name__ == "__main__":
    main()