<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">"""Write back all data it receives."""

import sys

data = sys.stdin.read(1)
while data:
    sys.stdout.write(data)
    sys.stdout.flush()
    data = sys.stdin.read(1)
sys.stderr.write("byebye")
sys.stderr.flush()
</pre></body></html>