\{3^2, 5\}, \{3, 4, 5\}, \{4^2, 5\}, \{5^2, 4\}, \{4^2, 6\}, \{6^2, 4\}, \{5^2, 6\}, \{6^2, 5\}, \{4,5,6\}\} \vert =6+3*12+2*6=54