const lines = require('fs')
  .readFileSync('/dev/stdin', 'utf-8')
  .trim().split('\n').values();

let S = lines.next().value;
const [i, j] = lines.next().value.split(' ');

S = S.split(/\B/);
[S[i], S[j]] = [S[j], S[i]];

console.log(S.join(''));