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#!/usr/bin/env python
"""Prepends a relative timestamp to each input line from stdin and writes it to stdout."""
from __future__ import annotations
import sys
import time
def main():
"""Main program entry point."""
start = time.time()
sys.stdin.reconfigure(errors="surrogateescape")
sys.stdout.reconfigure(errors="surrogateescape")
for line in sys.stdin:
seconds = time.time() - start
sys.stdout.write("%02d:%02d %s" % (seconds // 60, seconds % 60, line))
sys.stdout.flush()
if __name__ == "__main__":
main()
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