test.js

/**
 * Auto-generated code below aims at helping you parse
 * the standard input according to the problem statement.
 **/

const S = readline();

// Write an answer using console.log()
// To debug: console.error('Debug messages...');
console.error(S)
//console.error(.map(a => a.length - 2));
const matches = S.replace(/\\\\/g, '#').replace(/\\"/g, '#').match(/\"[^\"]+\"/g);
console.error(matches);
const lengths = (matches && matches.length) ? matches.map(a => a.length - 2): [0];
console.error(lengths)
console.log(lengths.reduce((a,b) => a + b, 0));