C312312111111331312111133133313331322331333133313331333131333132313233221   >>    C31231211111133131211113313331333132233133313331333133313133313231323322   <<    C312312111111331312111133133313331322331333133313331333131333132313233223   >>      C312312111111331312111133133313331322331333133313331333131333132313233222   >>