C111221232313231313231313231323223313233313331323133313231313221   >>    C11122123231323131323131323132322331323331333132313331323131322   <<    C111221232313231313231313231323223313233313331323133313231313223   >>      C111221232313231313231313231323223313233313331323133313231313222   >>