View Compilation Error

0_0_29874800_22734.cpp:3:1: error: 'sting' does not name a type
 sting a,b;
 ^
0_0_29874800_22734.cpp: In function 'void tree(int, int, char)':
0_0_29874800_22734.cpp:9:23: error: 'rigth' was not declared in this scope
  for(int i = letf;i < rigth; i++){
                       ^
0_0_29874800_22734.cpp:10:6: error: 'b' was not declared in this scope
   if(b[i] == c){
      ^
0_0_29874800_22734.cpp:12:17: error: 'a' was not declared in this scope
     tree(letf,i,a[cnt++]);
                 ^
0_0_29874800_22734.cpp:14:22: error: 'a' was not declared in this scope
     tree(i + 1,rigth,a[cnt++]);
                      ^
0_0_29874800_22734.cpp: In function 'int main()':
0_0_29874800_22734.cpp:28:9: error: 'a' was not declared in this scope
  cin >> a >> b;
         ^
0_0_29874800_22734.cpp:28:14: error: 'b' was not declared in this scope
  cin >> a >> b;
              ^