warning: `PUSHC` without corresponding `POPC` [-Wunmatched-directive]
    at unmatched-directive.asm(5)
warning: `PUSHO` without corresponding `POPO` [-Wunmatched-directive]
    at unmatched-directive.asm(5)
warning: `PUSHS` without corresponding `POPS` [-Wunmatched-directive]
    at unmatched-directive.asm(5)