C212212121213232233131313231323223313232233132222331323233231313221   >>    C21221212121323223313131323132322331323223313222233132323323131322   <<    C212212121213232233131313231323223313232233132222331323233231313223   >>      C212212121213232233131313231323223313232233132222331323233231313222   >>