encrypted by shifting left 1, cycle letters only, base layout = qwerty (if confused, then by the method, pyummuxlk should decypher to quizzical and the translation applies to just the letter keys.)
Ue qla dyb ri dufyew iyr l qiejibf aikyruib. U fir aolxw, wouxa, ouowa, quowe, lkkit, aouxw die nt aikyruib oler, rgiyfg U'n aryxj ib rgw auz-rqi-ibw rgubft.