3 import sys

     1 import sys

     4 

     2 

     5 for line in sys.stdin:

     3 for line in sys.stdin:

     6     if line.lower() in ("message-id: \n", "in-reply-to: \n"):

     4     if line.lower() in ("message-id: \n", "in-reply-to: \n"):

     7         line = line[:-2]

     5         line = line[:-2]