My output:
Error: Target sequence # 2: [CTTAGCAAGAAGTTATGAAA] is of 20-bp.
Error: Target sequence # 2: [GGCYCAGGACTTAGCAAGA] has bases other than ATGC.
Error: Target sequence # 3: [CAGGACTTAGCAAOOOAAGTT] has bases other than ATGC.
Error: Target sequence # 3: [CAGGACTTAGCAAOOOAAGTT] has bases other than ATGC.
Error: Target sequence # 3: [CAGGACTTAGCAAOOOAAGTT] has bases other than ATGC.
Error: Target sequence # 3: [CAGGACTTAGCAAOOOAAGTT] is of 21-bp.