Case 1 +----------+ | ^ | | / \ | | / \ | | < ACM > | | \ / | | \ / | | v | | | | | | | +----------+ Case 2 +----------+ |0123456789| |This is #1| |This is #2| |This is #3| |This is #4| |This Hello| |This World| |This is #7| |This is #8| |This is #0| +----------+