C1111233131211111211113313331333133313231312313331323221323221311   >>    C111123313121111121111331333133313331323131231333132322132322131   <<    C1111233131211111211113313331333133313231312313331323221323221313   >>      C1111233131211111211113313331333133313231312313331323221323221312   >>