View Compilation Error

0_0_38694434_6684.cpp: In member function 'T Stack<T>::top()':
0_0_38694434_6684.cpp:19:22: error: 'sek' was not declared in this scope; did you mean 'stk'?
   19 |     T top() { return sek[index]; }
      |                      ^~~
      |                      stk