/*
dfs即可AC。
注意：
在清澄oj（http://www.tsinsen.com/A1126）评测时，测试数据中应该有非小写英文字母开头的字符串。
codevs中的测试数据应该都是小写英文字母开头的字符串。
所以注意数据结构的设计。
*/
1 #include <iostream>
2 #include <cstdlib>
3 #include <cstdio>
4 #include <cstddef>
5 #include <iterator>
6 #include <algorithm>
7 #include <string>
8 #include <locale>
9 #include <cmath>
10 #include <vector>
11 #include <cstring>
12 #include <map>
13 #include <utility>
14 #include <queue>
15 #include <stack>
16 #include <set>
17 using namespace std;
18 const int INF = -0x3f3f3f3f;
19 const int MaxN = 55;
20 const int modPrime = 3046721;
21
22 struct Node
23 {
24 string str;
25 int cnt;
26 };
27
28 int n;
29 size_t answer = 0;
30 map<char, vector<Node> > wordSource;
31
32 void Solve(string goalStr, bool isFirst)
33 {
34 for (size_t m = 0; m < goalStr.size(); ++m)
35 {
36 if ((m != 0) || (m == 0 && isFirst))
37 {
38 for (size_t i = 0; i < wordSource[goalStr[m]].size(); ++i)
39 {
40 if (wordSource[goalStr[m]][i].cnt < 2)
41 {
42 string word = wordSource[goalStr[m]][i].str;
43 size_t matchCnt = 0;
44 while ((matchCnt < word.size()) && (m + matchCnt < goalStr.size())
45 && (word[matchCnt] == goalStr[m + matchCnt]))
46 {
47 ++matchCnt;
48 }
49 if ((matchCnt > 0) && (matchCnt < word.size()) && (m + matchCnt == goalStr.size()))
50 {
51 ++wordSource[goalStr[m]][i].cnt;
52 word.replace(0, matchCnt, goalStr);
53 answer = max(answer, word.size());
54 //cout << word << endl;
55 Solve(word, false);
56 --wordSource[goalStr[m]][i].cnt;
57 }
58 }
59 }
60 }
61 }
62 }
63
64
65 int main()
66 {
67 #ifdef HOME
68 freopen("in", "r", stdin);
69 //freopen("out", "w", stdout);
70 #endif
71
72 cin >> n;
73 Node node;
74 for (int i = 0; i < n; ++i)
75 {
76
77 cin >> node.str;
78 node.cnt = 0;
79 wordSource[node.str[0]].push_back(node);
80 }
81 string startStr;
82 cin >> startStr;
83 Solve(startStr, true);
84 cout << answer << endl;
85
86
87 #ifdef HOME
88 cerr << "Time elapsed: " << clock() / CLOCKS_PER_SEC << " ms" << endl;
89 _CrtDumpMemoryLeaks();
90 #endif
91 return 0;
92 }
