from typing import Any, Iterator

from ..base import BaseSolver


def index_of_first_n_differents(data: str, n: int) -> int:
    for i in range(len(data)):
        if len(set(data[i : i + n])) == n:
            return i + n
    return -1


class Solver(BaseSolver):
    def solve(self, input: str) -> Iterator[Any]:
        yield index_of_first_n_differents(input, 4)
        yield index_of_first_n_differents(input, 14)