View Compilation Error

0_0_39232085_763.cpp: In function 'int main()':
0_0_39232085_763.cpp:54:57: error: 'y1' was not declared in this scope; did you mean 'y2'?
   54 |                         if(a[x1][y11]==a[x2][y2]&&a[x1][y1])dfs(x1,y11,-1,0);
      |                                                         ^~
      |                                                         y2