/**
 * code generated by JHelper
 * More info: https://github.com/AlexeyDmitriev/JHelper
 * @author
 */

#include <iostream>
#include <fstream>

#ifndef SOLUTION_COMMON_H

#include <bits/stdc++.h>

using namespace std;

using ll = long long;
using PI = pair<int, int>;
template<class T> using V = vector<T>;
using VI = V<int>;
#define _1 first
#define _2 second

#ifdef MY_DEBUG
# define DEBUG(x) x
#else
# define DEBUG(x)
#endif

template<class T>
inline void debug(T &A) {
  DEBUG(
      for (const auto &a : A) {
        cerr << a << " ";
      }
      cerr << '\n';
  )
}

template<class T, class Func>
inline void debug_with_format(T &A, Func f) {
  DEBUG(
      for (const auto &a : A) {
        cerr << f(a) << " ";
      }
      cerr << '\n';
  )
}

template<class T>
inline void debug_dim2(T &A) {
  DEBUG(
      for (const auto &as : A) {
        debug(as);
      }
  )
}

template<typename ... Args>
inline void debug(const char *format, Args const &... args) {
  DEBUG(
      fprintf(stderr, format, args ...);
      cerr << '\n';
  )
}

template<typename ... Args>
string format(const string &fmt, Args ... args) {
  size_t len = snprintf(nullptr, 0, fmt.c_str(), args ...);
  vector<char> buf(len + 1);
  snprintf(&buf[0], len + 1, fmt.c_str(), args ...);
  return string(&buf[0], &buf[0] + len);
}

template<class T1, class T2>
string fmtP(pair<T1, T2> a) {
  stringstream ss;
  ss << "(" << a._1 << "," << a._2 << ")";
  return ss.str();
}

#define SOLUTION_COMMON_H

#endif //SOLUTION_COMMON_H

const int MOD = 1000000007;

class C {
public:
  void solve(std::istream& in, std::ostream& out) {
    int A, B, C;
    in >> A >> B >> C;
    char s0, s1;
    int t0, t1;
    in >> s0 >> t0 >> s1 >> t1;

    auto calc0 = [&](int t0, int t1, int me, int other) {
      int a1 = min(t0, t1) - 1;
      int an = me - max(t0, t1);
      return min(abs(t1 - t0), a1 + an + other);
    };

    auto calc1 = [&](int t0, int t1, int me0, int me1, int other) {
      int a1 = t0 - 1;
      int an = me0 - t0;
      int c1 = t1 - 1;
      int cn = me1 - t1;
      int rt1 = a1 + c1 + 1;
      int rt2 = an + cn + 1;
      int rt3 = a1 + other + cn + 1;
      int rt4 = an + other + c1 + 1;
      return min(min(rt1, rt2), min(rt3, rt4));
    };

    auto calcAll = [&](int t0, int t1) {
      if (s0 == s1) {
        if (s0 == 'A') {
          return calc0(t0, t1, A, min(B, C));
        } else if (s0 == 'B') {
          return calc0(t0, t1, B, min(A, C));
        } else {
          return calc0(t0, t1, C, min(A, B));
        }
      } else {
        if (s0 > s1) {
          swap(s0, s1);
          swap(t0, t1);
        }
        if (s0 == 'A' && s1 == 'B') {
          calc1(t0, t1, A, B, C);
        } else if (s0 == 'A' && s1 == 'C') {
          calc1(t0, t1, A, C, B);
        } else {
          calc1(t0, t1, B, C, A);
        }
      }
    };

    out << calcAll(t0, t1);
  }
};


int main() {
	C solver;
	std::istream& in(std::cin);
	std::ostream& out(std::cout);
	solver.solve(in, out);
	return 0;
}