let main = (standardInput) => {
    var moji = standardInput.trim();
    var moji2 = moji.replace(/[^0-9]/g, '');
    var array = moji2.split('').map(Number);
    var sum = array.reduce(function (accumulator, currentValue) {
    return accumulator + currentValue;
    }, 0);
    console.log(sum);
};
main(require('fs').readFileSync('/dev/stdin', 'UTF-8'));