#!/opt/conda/conda-bld/bx-python_1753187688228/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_pla/bin/python

"""
Simple script to add a prefix to every line in a file.
"""

import sys

for line in sys.stdin:
    print(sys.argv[1] + line, end=" ")
