assignment 1

#my first python program
import sys

#searchString = 'a'
#trString = 'e'

def translator(w):  
		 return w.replace(searchString,trString)


searchString = sys.argv[1]
trString = sys.argv [2]	

for letter in searchString:
	letter = searchString[1] 
	print letter

for line in sys.stdin:
	line = line.strip()
	#make a list of words from the line in stdin
	words = [w for w in line.split(" ")]
	# translate each word in that line
	translated = [translator(w) for w in words]
	print " ".join(translated)