from fileinput import input reports = [[int(level) for level in report.split()] for report in input()] def incr(xs): return all(x < y and y - x <= 3 for x, y in zip(xs, xs[1:])) def safe(xs): return incr(xs) or incr(xs[::-1]) def drops(xs): return (xs[:idx] + xs[idx + 1 :] for idx, _ in enumerate(xs)) silver = sum(safe(rep) for rep in reports) gold = sum(any(safe(mod) for mod in drops(rep)) for rep in reports) print("silver:", silver) print("gold:", gold)