C1111233131211111211113313331333133313331312331333132221123232321323131   >>    C111123313121111121111331333133313331333131233133313222112323232132313   <<    C1111233131211111211113313331333133313331312331333132221123232321323133   >>      C1111233131211111211113313331333133313331312331333132221123232321323132   >>