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# Use a list comprehension to square each odd number in a list. The list is input by a sequence of comma-separated numbers. Suppose the following input is supplied to the program:

# 1,2,3,4,5,6,7,8,9
# Then, the output should be:

# 1,3,5,7,9

lst = [i for i in input().split(',') if int(i) % 2]
print(",".join(lst))