C22212323232133313113313331333133313231323132222123331331123121   >>    C2221232323213331311331333133313331323132313222212333133112312   <<    C22212323232133313113313331333133313231323132222123331331123123   >>      C22212323232133313113313331333133313231323132222123331331123122   >>