#!/usr/bin/env python3
import sys
import fileinput
import contextlib


def main() -> None:
    for line in fileinput.input(encoding="utf-8", mode="r"):  # type: ignore
        sys.stdout.write(line.casefold())

    sys.stdout.flush()


if __name__ == "__main__":
    with contextlib.suppress(KeyboardInterrupt):
        main()