+adabacaba
-adabacaba
+aca
aca:caba
-aca
+bacaba
-bacaba
+aba
-aba
+bad
 +cab
+abac
-abac
+baca
 +8UjgAJ
8UjgAJ:02hR7UBc1tqqfL
-8UjgAJ
+zdi
-zdi
 +acabadab
+caba0aba
 +Dmitry
+Mike
Dmitry:All letters will be used
Dmitry:qwertyuiopasdfghjklzxcvbnm QWERTYUIOPASDFGHJKLZXCVBNM
Dmitry:And digits too
Dmitry:1234567890 0987654321
-Dmitry
 +Dmitry
+Mike
+Kate
Dmitry:
 +badabac
badabac:abacabad
-badabac
+0ab
-0ab
+dabacab
-dabacab
+a0ab
-a0ab
+0abaca
-0abaca
+dabac
-dabac
+abaca
-abaca
+bacabada
-bacabada
+aca
-aca
+abadabaca
-abadabaca
+acaba
-acaba
+abacabadab
-abacabadab
 +qlHEc2AuYy
qlHEc2AuYy:YYRwD0 edNZgpE nGfOguRWnMYpTpGUVM aXDKGXo1Gv1tHL9
qlHEc2AuYy:yvh3GsPcImqrvoUcBNQcP6ezwpU0 xAVltaKZp94VKiNao
qlHEc2AuYy:zuCO6Opey L  eu7lTwysaSk00zjpv zrDfbt8l  hpHfu
+pErDMxgVgh
qlHEc2AuYy:I1FLis  mmQbZtd8Ui7y 1vcax6yZBMhVRdD6Ahlq7MNCw
qlHEc2AuYy:lz MFUNJZhlqBYckHUDlNhLiEkmecRh1o0t7alXBvCRVEFVx
pErDMxgVgh:jCyMbu1dkuEj5TzbBOjyUhpfC50cL8R900Je3R KxRgAI dT
qlHEc2AuYy:62b47eabo2hf vSUD7KioN ZHki6WB6gh3u GKv5rgwyfF
pErDMxgVgh:zD5 9 ympl4wR gy7a7eAGAn5xVdGP9FbL6hRCZAR6O4pT6zb
 +6JPKkgXDrA
+j6JHjv70An
+QGtsceK0zJ
6JPKkgXDrA:o4
+CSmwi9zDra
QGtsceK0zJ:Zl
QGtsceK0zJ:0
j6JHjv70An:7
j6JHjv70An:B
QGtsceK0zJ:OO
 +Dmitry
Dmitry:No phrases with spaces at the beginning and at the end
+Mike
Dmitry:spaces    spaces
-Dmitry
 +1aLNq9S7uLV
-1aLNq9S7uLV
+O9ykq3xDJv
-O9ykq3xDJv
+54Yq1xJq14F
+0zJ5Vo0RDZ
-54Yq1xJq14F
-0zJ5Vo0RDZ
+lxlH7sdolyL
-lxlH7sdolyL
 +adabacaba0
 +dabaca
-dabaca
+aba0ab
 +XqD
+aT537
XqD:x6ZPjMR1DDKG2
XqD:lLCriywPnB
-XqD
 +cabadabac
-cabadabac
+abacaba1ab
-abacaba1ab
+ba0abaca
 +acabadab
-acabadab
+aba0abacab
+baca
+abacaba0ab
-baca
-abacaba0ab
-aba0abacab
+cab
-cab
+abacabada
-abacabada
+badabaca
-badabaca
+badaba

4
 0
 14
 0
 224
 0
 8
 615
 34
 86
 0
 0
 0
 46
 0
 0

#include <bits/stdc++.h>
using namespace std;
template <typename T, size_t N>
int SIZE(const T (&t)[N]) {
  return N;
}
template <typename T>
int SIZE(const T &t) {
  return t.size();
}
string to_string(const string s, int x1 = 0, int x2 = 1e9) {
  return '"' + ((x1 < (int)s.size()) ? s.substr(x1, x2 - x1 + 1) : "") + '"';
}
string to_string(const char *s) { return to_string((string)s); }
string to_string(const bool b) { return (b ? "true" : "false"); }
string to_string(const char c) { return string({c}); }
template <size_t N>
string to_string(const bitset<N> &b, int x1 = 0, int x2 = 1e9) {
  string t = "";
  for (int __iii__ = min(x1, SIZE(b)), __jjj__ = min(x2, SIZE(b) - 1);
       __iii__ <= __jjj__; ++__iii__) {
    t += b[__iii__] + '0';
  }
  return '"' + t + '"';
}
template <typename A, typename... C>
string to_string(const A(&v), int x1 = 0, int x2 = 1e9, C... coords);
int l_v_l_v_l = 0, t_a_b_s = 0;
template <typename A, typename B>
string to_string(const pair<A, B> &p) {
  l_v_l_v_l++;
  string res = "(" + to_string(p.first) + ", " + to_string(p.second) + ")";
  l_v_l_v_l--;
  return res;
}
template <typename A, typename... C>
string to_string(const A(&v), int x1, int x2, C... coords) {
  int rnk = rank<A>::value;
  string tab(t_a_b_s, ' ');
  string res = "";
  bool first = true;
  if (l_v_l_v_l == 0) res += '\n';
  res += tab + "[";
  x1 = min(x1, SIZE(v)), x2 = min(x2, SIZE(v));
  auto l = begin(v);
  advance(l, x1);
  auto r = l;
  advance(r, (x2 - x1) + (x2 < SIZE(v)));
  for (auto e = l; e != r; e = next(e)) {
    if (!first) {
      res += ", ";
    }
    first = false;
    l_v_l_v_l++;
    if (e != l) {
      if (rnk > 1) {
        res += '\n';
        t_a_b_s = l_v_l_v_l;
      };
    } else {
      t_a_b_s = 0;
    }
    res += to_string(*e, coords...);
    l_v_l_v_l--;
  }
  res += "]";
  if (l_v_l_v_l == 0) res += '\n';
  return res;
}
void dbgm() { ; }
template <typename Heads, typename... Tails>
void dbgm(Heads H, Tails... T) {
  cerr << to_string(H) << " | ";
  dbgm(T...);
}
double eps = 1e-9;
double PI = acos(-1);
const int MOD = 1000000007;
void solve() {
  string s;
  int curr = 0;
  int ans = 0;
  while (getline(cin, s)) {
    cerr << "------------" << '\n'
         << __func__ << ":" << 177 << " ==> "
         << "["
         << "s"
         << "]:  ";
    cerr << to_string(s) << '\n';
    if (*(s.begin()) == '+') {
      curr++;
    } else if (*(s.begin()) == '-') {
      curr--;
    } else {
      auto place = s.find(':');
      string second = s.substr(place + 1);
      cerr << "------------" << '\n'
           << __func__ << ":" << 185 << " ==> "
           << "["
           << "ss"
           << "]:  ";
      cerr << to_string(second) << '\n';
      ans = ans + curr * second.size();
    }
  }
  cout << ans << '\n';
}
int32_t main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.precision(20);
  int cases;
  cases = 1;
  for (int i = 1; i <= cases; i++) {
    solve();
  }
}
