#include <iostream>

 #include <string>

 using namespace std;

 int fac(int num);

 int C(int n,int m);

 int com( int n, int k );

 int main()

 {

     //freopen("acm.acm","r",stdin);

     string s;

     int sum;

     int j;

     int i;

 //    cout<<com(4,2)<<endl;

     while(cin>>s)

     {

         sum = ;

         for(i = ; i < s.length()-; ++ i)

         {

             sum += com(,i+);

         }

 //        cout<<s<<endl;

 //        cout<<"sum        "<<sum<<endl;

         //cout<<"len "<<s.length()<<endl;

         for(i = ; i < s.length(); ++ i)

         {

             for(j = i+; j < s.length(); ++ j)

             {

                 if(s[i] >= s[j])

                 {

                     break;

                 }

             }

             if(j != s.length())

             {

                 break;

             }

         }

         if(i != s.length())

         {

             cout<<<<endl;

             continue;

         }

         for(i = ; i < s.length(); ++ i)

         {

             if(i == )

             {

                 j = ;

             }

             else

             {

                 j = s[i-]-'a'+;

             }

             for(; j < s[i]-'a'; ++ j)

             {

                 sum += com(-j-,s.length()-i-);

             }

         }

         cout<<sum+<<endl;

     }

 }

 int C(int n,int m)

 {

     return fac(n)/(fac(m)*fac(n-m));

 }

 int fac(int num)

 {

     int i;

     int sum = ;

     for(i = ; i <= num; ++ i)

     {

         sum *= i;

     }

     return sum;

 }

 int com( int n, int k )

 {

 if ( k> )

 {

    return com(n-, k- ) * n / k;//组合公式

 }

 return ;

 }