#include <bits/stdc++.h>   using namespace std;   template <typename _T>   inline void read(_T &f) {     f = 0;     _T fu = 1;     char c = getchar();     while (c <  0  || c >  9 ) {       if (c ==  - ) fu = -1;       c = getchar();     }     while (c >=  0  && c <=  9 ) {       f = (f << 3) + (f << 1) + (c & 15);       c = getchar();     }     f *= fu;   }   template <typename T>   void print(T x) {     if (x < 0) putchar( - ), x = -x;     if (x < 10)       putchar(x + 48);     else       print(x / 10), putchar(x % 10 + 48);   }   template <typename T>   void print(T x, char t) {     print(x);     putchar(t);   }   template <typename T>   struct hash_map_t {     vector<T> v, val, nxt;     vector<int> head;     int mod, tot, lastv;     T lastans;     bool have_ans;     hash_map_t(int md = 0) {       head.clear();       v.clear();       val.clear();       nxt.clear();       tot = 0;       mod = md;       nxt.resize(1);       v.resize(1);       val.resize(1);       head.resize(mod);       have_ans = 0;     }     bool count(int x) {       int u = x % mod;       for (register int i = head[u]; i; i = nxt[i]) {         if (v[i] == x) {           have_ans = 1;           lastv = x;           lastans = val[i];           return 1;         }       }       return 0;     }     void ins(int x, int y) {       int u = x % mod;       nxt.push_back(head[u]);       head[u] = ++tot;       v.push_back(x);       val.push_back(y);     }     int qry(int x) {       if (have_ans && lastv == x) return lastans;       count(x);       return lastans;     }   };   const int N = 755, MAXN = 1e7 + 5;   queue<int> q;   char c[MAXN];   vector<int> adj[N << 1];   int ch[MAXN][2], fail[MAXN], id[MAXN], l[N], r[N], pre[N << 1], used[N << 1],       vis[N << 1];   int f[N][N], n, len, tot, dfn, ans;   int dfs1(int u) {     for (register unsigned i = 0; i < adj[u].size(); i++) {       int v = adj[u][i];       if (used[v] != dfn) {         used[v] = dfn;         if (!pre[v] || dfs1(pre[v])) {           pre[v] = u;           pre[u] = v;           return 1;         }       }     }     return 0;   }   void dfs2(int u) {     vis[u] = 1;     for (register unsigned i = 0; i < adj[u].size(); i++) {       int v = adj[u][i];       if (!vis[v] && pre[v]) vis[v] = 1, dfs2(pre[v]);     }   }   int main() {     read(n);     for (register int i = 1; i <= n; i++) {       scanf( %s , c + r[i - 1] + 1);       len = strlen(c + r[i - 1] + 1);       l[i] = r[i - 1] + 1;       r[i] = l[i] + len - 1;       int now = 0;       for (register int j = l[i]; j <= r[i]; j++) {         int x = c[j] -  a ;         if (!ch[now][x]) ch[now][x] = ++tot;         now = ch[now][x];       }       id[now] = i;     }     for (register int i = 0; i <= 1; i++)       if (ch[0][i]) q.push(ch[0][i]);     while (!q.empty()) {       int u = q.front();       q.pop();       for (register int i = 0; i <= 1; i++) {         int v = ch[u][i];         if (!v) continue;         int now = fail[u], last = 1;         while (last) {           if (ch[now][i]) {             fail[v] = ch[now][i];             break;           }           last = now;           now = fail[now];         }         if (!id[v]) id[v] = id[fail[v]];         q.push(v);       }     }     for (register int i = 1; i <= n; i++) {       int now = 0;       for (register int j = l[i]; j <= r[i]; j++) {         int x = c[j] -  a ;         now = ch[now][x];         if (j == r[i])           f[i][id[fail[now]]] = 1;         else           f[i][id[now]] = 1;       }     }     for (register int k = 1; k <= n; k++) {       for (register int i = 1; i <= n; i++) {         for (register int j = 1; j <= n; j++) {           f[i][j] |= (f[i][k] & f[k][j]);         }       }     }     for (register int i = 1; i <= n; i++) {       for (register int j = 1; j <= n; j++) {         if (f[i][j]) {           adj[i].push_back(j + n);           adj[j + n].push_back(i);         }       }     }     ans = n;     for (register int i = 1; i <= n; i++)       if (!pre[i]) ++dfn, ans -= dfs1(i);     print(ans,   n );     for (register int i = 1; i <= n; i++)       if (!pre[i]) dfs2(i);     for (register int i = 1; i <= n; i++)       if (vis[i] && !vis[i + n]) print(i,    );     putchar(  n );     return 0;   }