View Compilation Error

0_0_25064598_1803.cpp: In function 'int main()':
0_0_25064598_1803.cpp:28:5: error: expected primary-expression before 'if'
     if(upper.find(First)==upper.end())lower.erase(First);
     ^
0_0_25064598_1803.cpp:29:5: error: expected '}' before 'else'
     else upper.erase(First);
     ^
0_0_25064598_1803.cpp:29:22: error: 'First' was not declared in this scope
     else upper.erase(First);
                      ^
0_0_25064598_1803.cpp: At global scope:
0_0_25064598_1803.cpp:44:2: error: expected unqualified-id before 'return'
  return 0;
  ^
0_0_25064598_1803.cpp:45:1: error: expected declaration before '}' token
 }
 ^