english: Or, when you're designing a piece, make sure you either can't put it in the wrong way round, or, if you do, it doesn't matter, because it's symmetrical.
non_english: Alebo, keď navrhujete časti, dajte si pozor, aby ste ich  neposkladali naopak, alebo aby to bolo jedno,  lebo sú symetrické.