C22212323232133313113313331333133313231323223323232233312121321   >>    C2221232323213331311331333133313331323132322332323223331212132   <<    C22212323232133313113313331333133313231323223323232233312121323   >>      C22212323232133313113313331333133313231323223323232233312121322   >>