Part 1 one-line
print(len(list(filter(lambda x: int(x[0][0])<=int(x[1][0]) and int(x[0][1])>=int(x[1][1]) or (int(x[1][0])<=int(x[0][0]) and int(x[1][1])>=int(x[0][1])),[list(map(lambda x: x.split('-'),l.strip().split(','))) for l in open('input.txt')]))))