#include //#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include //using namespace atcoder; using namespace std; using ll = long long; #define all(A) A.begin(),A.end() using vll = vector; #define rep(i, n) for (long long i = 0; i < (long long)(n); i++) using Graph = vector>>; vector seen; bool C = true; vector dist; ll mod =1e9+7; int main() { string N; cin >> N; cout << abs(ll(N.size()-10)) << endl; }