C22121333132313311211113313331333133313331123211113313232223221   >>    C2212133313231331121111331333133313331333112321111331323222322   <<    C22121333132313311211113313331333133313331123211113313232223223   >>      C22121333132313311211113313331333133313331123211113313232223222   >>