1 /* 2     水! 3 */ 4 #include 
     
       5 #include 
      
        6 #include 
       
         7 using namespace std; 8  9 const int MAXN = 1e2 + 10;10 const int INF = 0x3f3f3f3f;11 char s[MAXN];12 13 int main(void)        //CodeForces 137A Postcards and photos14 {15 //    freopen ("E.in", "r", stdin);16 17     while (scanf ("%s", s) == 1)18     {19         int len = strlen (s);20         int ans = 0;    int i = 0;21         while (i < len)22         {23             char ch = s[i];    int cnt = 1;24             while (cnt < 5 && i < len)25             {26                 if (s[i+1] == ch)27                 {28                     ++cnt;    ++i;29                 }30                 else    break;31             }32             ans++;    i++;33         }34 35         printf ("%d\n", ans);36     }37 38     return 0;39 }