C3131313233313113313223313223313112113313233313133313231323311221   >>    C313131323331311331322331322331311211331323331313331323132331122   <<    C3131313233313113313223313223313112113313233313133313231323311223   >>      C3131313233313113313223313223313112113313233313133313231323311222   >>