View Compilation Error

0_0_39583529_13161.cpp: In function 'int main()':
0_0_39583529_13161.cpp:14:17: error: 'len2' was not declared in this scope; did you mean 'len'?
   14 |                 len2=s2.size()-1;
      |                 ^~~~
      |                 len
0_0_39583529_13161.cpp:14:22: error: 's2' was not declared in this scope; did you mean 's'?
   14 |                 len2=s2.size()-1;
      |                      ^~
      |                      s