这道题用的递归和DFS都应该至少是普及-的吧？

#include<bits/stdc++.h> using namespace std; char a[8][4]={{'a','b','c'},{'d','e','f'},{'g','h','i'},{'j','k','l'},{'m','n','o'},{'p','q','r','s'},{'t','u','v'},{'w','x','y','z'}} int main(){ }