Mixed sequence

A sequence of characters separated by spaces is given. Each character of the sequence is a capital or small letter of the Latin alphabet, or a digit from 0 to 9.

Find the sum of the numbers in this sequence. The number of characters included in the sequence is no more than 10000.

Input

Sequence of characters separated by spaces.

Output

Print the sum of the digits in the sequence, or 0 if there are no digits in the sequence.

Examples