function solve(inp) {

  let start = inp.shift().charCodeAt();

  let end = inp.shift().charCodeAt();

  let string = inp.shift();

  let i = start;

  let sum = 0;


  while (i <= end) {

    let curChar = String.fromCharCode(i);

    if (string.includes(curChar)) {

    sum += curChar.charCodeAt();

    }

    i++;

  }


  console.log(sum);




}