1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
v=XaaaXbbbX [ "${v\ #\ *\ a}.${v\ #\ #\ *\ a}.${v\ %\ b\ *}.${v\ %\ %\ b\ *}" = aaXbbbX.XbbbX.XaaaXbb.XaaaX ]