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001
☐☑☑☑☑☑☑☑☑☑☑☑☒
☑☐☑☑☑☑☑☑☑☑☑☑☒
☑☑☐☑☑☑☑☑☑☑☑☑☒
☑☑☑☐☑☑☑☑☑☑☑☑☒
☑☑☑☑☐☑☑☑☑☑☑☑☒
☑☑☑☑☑☐☑☑☑☑☑☑☒
☑☑☑☑☑☑☐☑☑☑☑☑☒
☑☑☑☑☑☑☑☐☑☑☑☑☒
☑☑☑☑☑☑☑☑☐☑☑☑☒
☑☑☑☑☑☑☑☑☑☐☑☑☒
☑☑☑☑☑☑☑☑☑☑☐☑☒
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this test case results - stack overflow