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Competitions

# 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.

Time limit 1 second
Memory limit 128 MiB
Input example #1
A 1 2 B C D A B C 1 9 B 3

Output example #1
16

Input example #2
A B C

Output example #2
0

Source 2020 XXXIV regional olympiad in informatics, Zhitomyr