Sum of Odd Numbers

You are given a single line of input which represents a list of integers. The input can either be the string None (indicating that the list is empty) or a sequence of integers separated by spaces.

Your task is to compute the sum of all odd numbers in the list. In mathematical notation, you need to compute $$\sum_{i: a_i \text{ is odd}} a_i.$$ If the list is empty or the input is None, output 0.

The input should be read from stdin and the result must be printed to stdout.

inputFormat

The input consists of a single line which is either the string None or a space-separated list of integers. For example:

1 2 3 4 5

outputFormat

Output a single integer denoting the sum of all odd numbers from the input list.

1 2 3 4 5

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