text: 'use strict';
  function insertSubstringToStringAfterWordNumber(str, substr, indexInsert) {
      const strBeforeIndexInsert = str.split(' ').slice(0, indexInsert + 1).join(' ');
      const strAfterIndexInsert = str.split(' ').slice(indexInsert + 1).join(' ');
      
      return strBeforeIndexInsert + ' ' + substr + ' ' + strAfterIndexInsert;
  }
  
  module.exports = insertSubstringToStringAfterWordNumber;
  