Detect the underlying emotion in the following statement.
I can't believe I messed up again.
The underlying emotion in the statement, "I can't believe I messed up again," is frustration and possibly disappointment in oneself.
Complete the following task based on the instruction and optional input provided.### Instruction:
Detect the underlying emotion in the following statement.

### Input:
I can't believe I messed up again.

### Output:
The underlying emotion in the statement, "I can't believe I messed up again," is frustration and possibly disappointment in oneself.