#include <cstdio>
#include <stack>
#include <set>
#include <iostream>
#include <string>
#include <vector>
#include <queue>
#include <functional>
#include <cstring>
#include <algorithm>
#include <cctype>
#include <ctime>
#include <cstdlib>
#include <fstream>
#include <string>
#include <sstream>
#include <map>
#include <cmath>
#define LL long long
#define SZ(x) (int)x.size()
#define Lowbit(x) ((x) & (-x))
#define MP(a, b) make_pair(a, b)
#define MS(arr, num) memset(arr, num, sizeof(arr))
#define PB push_back
#define F first
#define S second
#define ROP freopen("input.txt", "r", stdin);
#define MID(a, b) (a + ((b - a) >> 1))
#define LC rt << 1, l, mid
#define RC rt << 1|1, mid + 1, r
#define LRT rt << 1
#define RRT rt << 1|1
#define BitCount(x) __builtin_popcount(x)
const double PI = acos(-1.0);
const int INF = 0x3f3f3f3f;
using namespace std;
const int MAXN = 4000 * 1000 + 5;
const int MOD = 20071027;
 
typedef pair<int, int> pii;
typedef vector<int>::iterator viti;
typedef vector<pii>::iterator vitii;
 
char str[1010];
 
struct TRIE
{
    int head[MAXN], next[MAXN], ch[MAXN], val[MAXN];
    int sz;
    LL ans;
 
    void init()
    {
        sz = 1; ans = 0; ch[0] = 0; head[0] = next[0] = val[0] = 0;
    }
 
    void insert(char *s)
    {
        int len = strlen(s), u = 0, p;
        for (int i = 0; i <= len; i++)
        {
            for (p = head[u]; p; p = next[p])
                if (ch[p] == s[i]) break;
            if (!p)
            {
                p = sz++;
                ch[p] = s[i];
                next[p] = head[u];
                head[u] = p;
                head[p] = 0;
                val[p] = 0;
            }
            ans += (val[u] - val[p]) * (2 * i + 1);
            if (i == len)
            {
                ans += val[p] * (2 * (i + 1));
                val[p]++;
            }
            val[u]++;
            u = p;
        }
    }
 
}trie;
 
int main()
{
    //ROP;
    int n, i, j, cases = 0;
    while (scanf("%d%*c", &n), n)
    {
        trie.init();
        while (n--)
        {
            scanf("%s", str);
            trie.insert(str);
        }
        printf("Case %d: %lld\n", ++cases, trie.ans);
    }
    return 0;
}