C111123313331323113313331333133313231323133313231311132313233311   >>    C11112331333132311331333133313331323132313331323131113231323331   <<    C111123313331323113313331333133313231323133313231311132313233313   >>      C111123313331323113313331333133313231323133313231311132313233312   >>