# 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


_IN = input().split(",")
for i in _IN:
    if int(i) % 2 == 0:
        _IN.remove(i)
print(",".join(_IN))