ELLA is ringed twice, in rows 5 and 7, which is 2 rows apart. From rows 4 through 8, both Ellas are within 3 rows, so those rows remain in the suspect pool for clue 7. BRIAN is underlined twice, in rows 4 and 11, which is 7 rows apart, so that pair never lines up from any row, and BRIAN is eliminated. Every other row is eliminated: from rows 2 and 3, only the row-5 Ella is in range, since row 7's Ella is 5 and 4 rows away, and rows 1, 9, 10, 11, and 12 have no duplicate pair within 3 rows at all.