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Medium · Puzzle #166
9
7
8
4
4
3
9
1
2
5
6
8
7
5
6
2
5
3
9
2
3
8
4
2
7
6
3
2
7
1
8
"Concentration is the secret of strength in politics, in war, in trade — in short, in all management of human affairs." — Ralph Waldo Emerson
"Concentration is the secret of strength in politics, in war, in trade — in short, in all management of human affairs." — Ralph Waldo Emerson
"Absence of evidence is not evidence of absence." — Carl Sagan
"Absence of evidence is not evidence of absence." — Carl Sagan