function solve(input) {

  let str = input.shift();

  let str2 = '';

  while (input[0] !== 'Done') {

    let cur = input.shift().split(' ');

    let command = cur[0];

    // console.log(cur);

    if (command === 'TakeOdd') {

      let strLength = str.length;

      if (str2.length > 0) {

        str = str2;

        str2 = '';

        strLength = str.length;

      }


      for (let i = 0; i < strLength; i++) {

        if (i % 2 !== 0) {

          str2 += str[i];

        }

      }

      console.log(str2);

    } else if (command === 'Cut') {

      if (str2 === '') {

        str2 = str;

      }

      let subStr = str2.substring(cur[1]);

      let subStr2 = subStr.substring(cur[2]);

      str2 = str2.substring(0, cur[1]);

      str2 += subStr2;

      console.log(str2);

    } else if (command === 'Substitute') {

      if (str2 === '') {

        str2 = str;

      }

      if (str2.includes(cur[1])) {

        while (str2.includes(cur[1])) {

          str2 = str2.replace(cur[1], cur[2]);

        }

        console.log(str2);

      } else {

        console.log(`Nothing to replace!`);

      }

    }

  }

  console.log(`Your password is: ${str2}`);

}