C1111233131211111211113313331333133313231333112211232322331333131121323231   >>    C111123313121111121111331333133313331323133311221123232233133313112132323   <<    C1111233131211111211113313331333133313231333112211232322331333131121323233   >>      C1111233131211111211113313331333133313231333112211232322331333131121323232   >>