| 1 | #!/usr/bin/python |
| 2 | from sys import stdin, stdout |
| 3 | while True: |
| 4 | c = stdin.read(2) |
| 5 | if len(c) < 2: |
| 6 | break |
| 7 | n1, n2 = ord(c[0]), ord(c[1]) |
| 8 | stdout.write(chr(((n2 & 15) << 4) + ((n2 & 240) >> 4))) |
| 9 | stdout.write(chr(((n1 & 15) << 4) + ((n1 & 240) >> 4))) |
| 10 | |
