题目:如图,足球的球面是由若干个正五边形和正六边形拼接而成,规则如下:(1)所有正五边形或正六边形的边长都相等;(2)任意两块至多沿一组对边拼接;(3)任意三块至多有一个交点(称其为顶点),多于三块的图没有交点;(4)每个顶点都是两块正六边形一块正五边形的交点。已知有正五边形12块,则正六边形的块数为多少? Title: As shown in the figure, the sphere of a soccer ball is composed of a number of regular pentagons and regular hexagons, the rules are as follows: (1) All regular pentagons or regular hexagons have the same side length; (2) (3) There is at most one intersection (called vertex) of any three blocks, and there is no intersection of more than three blocks. (4) Each vertex is two positive hexagons Intersection of pentagons. Knowing that there are 12 regular pentagons, what is the number of regular hexagons?