C1111233131211111211113313231333133313331323221211113313221312321   >>    C111123313121111121111331323133313331333132322121111331322131232   <<    C1111233131211111211113313231333133313331323221211113313221312323   >>      C1111233131211111211113313231333133313331323221211113313221312322   >>