人口普查

def solve(n, data):
    n = int(n)
    lines = str(data).strip().split(',')
    valid = []
    for line in lines:
        parts = line.split()
        name = parts[0]
        by, bm, bd = map(int, parts[1].split('/'))
        birth = (by, bm, bd)
        if (1814, 9, 6) <= birth <= (2014, 9, 6):
            valid.append((birth, name))
    if not valid:
        print(0)
    else:
        print(len(valid))
        oldest = min(valid)[1]
        youngest = max(valid)[1]
        print(f'{oldest} {youngest}')