function solve() {

   Array.from(document.getElementsByTagName('button')).forEach((btn) => {
      btn.addEventListener('click', changeStatus)
   });

   let inputElements = document.getElementsByTagName('input');

   let radioButtons = [];

   for (i = 0; i < inputElements.length; i++) {
      if (inputElements[i].type === 'radio') {
         radioButtons.push(inputElements[i]);
      }
   }

   radioButtons.forEach((btn) => {
      btn.addEventListener('click', buttonChangeStatus)
   });

   function buttonChangeStatus(e) {
      let button = e.target;

      let parent = button.parentNode;

      button.checked = true;


      if (button.value === "lock") {
         parent.getElementsByTagName('input')[1].checked = false;

      }

      else if (button.value === "unlock") {
         parent.getElementsByTagName('input')[0].checked = false;
      }


   }

   function changeStatus(e) {
      let button = e.target;

      let parent = button.parentNode;
      let status = parent.getElementsByTagName('input')[0];

      if (status.checked === false) {

         if (button.textContent === "Show more") {
            let userNumber = parent.getElementsByTagName('input')[2].value;
            if (userNumber === 'First User') {
               let hiddenFields = document.getElementById('user1HiddenFields');
               hiddenFields.style.display = 'block';
            }
            else if (userNumber === 'Second User') {
               document.getElementById('user2HiddenFields').style.display = 'block';
            }

            else {
               document.getElementById('user3HiddenFields').style.display = 'block';
            }

            button.textContent = 'Hide it';
         }

         else {
            let userNumber = parent.getElementsByTagName('input')[2].value;
            if (userNumber === 'First User') {
               let hiddenFields = document.getElementById('user1HiddenFields');
               hiddenFields.style.display = 'none';
            }
            else if (userNumber === 'Second User') {
               document.getElementById('user2HiddenFields').style.display = 'none';
            }

            else {
               document.getElementById('user3HiddenFields').style.display = 'none';
            }

            button.textContent = 'Show more';
         }
      }
   }
}