const row = require('fs').readFileSync('/dev/stdin','utf8').split('\n');
const numbers = [];
const column = row[0].split('').map(e => {
    if(/\d/.test(e)) {
        numbers.push(Number(e));
    }
    return undefined;
});

const result = numbers.reduce((acc,cur) => {
    return acc + cur;
})
console.log(result);