#!/usr/bin/env python
#-*-encoding:UTF-8-*-
with open("input_1.txt") as inpt1:
    with open("input_2.txt") as inpt2:
        with open("out.txt", "w") as out:
            for line in inpt1:
                line = line.strip().split(":")
                if len(line) == 2:
                    out.write("{0}:{1}\n".format(line[1], line[0]))
                else:
                    print "BAD FORMAT {0}".format(":".join(line))
            for line in inpt2:
                line = line.strip().split(":")
                if len(line) == 2:
                    out.write("{0}:{1}\n".format(line[1], line[0]))
                else:
                    print "BAD FORMAT {0}".format(":".join(line))