C1111233133313231133133313331333133313231312111133131133131113222313221   >>    C111123313331323113313331333133313331323131211113313113313111322231322   <<    C1111233133313231133133313331333133313231312111133131133131113222313223   >>      C1111233133313231133133313331333133313231312111133131133131113222313222   >>