View Compilation Error

0_0_33365887_14933.cpp: In function 'int find()':
0_0_33365887_14933.cpp:104:9: error: 'keya' was not declared in this scope
  return keya[a1]^keyb[a2];
         ^
0_0_33365887_14933.cpp:104:18: error: 'keyb' was not declared in this scope
  return keya[a1]^keyb[a2];
                  ^