C11111333133313232233133313331333131123313221211113313222122321   >>    C1111133313331323223313331333133313112331322121111331322212232   <<    C11111333133313232233133313331333131123313221211113313222122323   >>      C11111333133313232233133313331333131123313221211113313222122322   >>