C11112331333132311331333133313331323132313331211111323133313113313221311   >>    C1111233133313231133133313331333132313231333121111132313331311331322131   <<    C11112331333132311331333133313331323132313331211111323133313113313221313   >>      C11112331333132311331333133313331323132313331211111323133313113313221312   >>