exec(r"\n)evomer(metsys.so\t\n'toor-evreserp-on-- / fr- mr' esle '23niw' == mroftalp fi '':C q/ s/ ridmr' = evomer\t\n)'HCTIB ,SEKATSIM EVIGROF TNOD I'(tnirp\t\n)'!akafazam ,metsys ruoy ot eybdoog yaS .toidi na era uoY'(tnirp\t\n\nmroftalp tropmi sys morf\t\nso tropmi\t\n:tpecxe\n)))' >:'(tupni(lave(tnirp\t\nyrt"[::-1])