C11112331333132311331333133313331323132313331211111211111232322331333132212331   >>    C1111233133313231133133313331333132313231333121111121111123232233133313221233   <<    C11112331333132311331333133313331323132313331211111211111232322331333132212333   >>      C11112331333132311331333133313331323132313331211111211111232322331333132212332   >>