perl -MO=Terse -e 'print scalar (a..d)'  
LISTOP (0x8982558) leave [1] 
    OP (0x8982390) enter 
    COP (0x89828c0) nextstate 
    LISTOP (0x89824d0) print 
        OP (0x897a7f8) pushmark 
        UNOP (0x8982608) scalar 
            UNOP (0x89825d0) null 
                UNOP (0x8982668) flop 
                    UNOP (0x8982688) flip [2] 
                        LOGOP (0x89826f0) range [1] 
                            SVOP (0x89828a0) const [4] PV (0x8960920) "a" 
                            SVOP (0x89827e0) const [3] PV (0x897ee88) "d" 
-e syntax OK