using System;
using System.Collections.Generic;
using System.Collections;
using System.Collections.Specialized;
using System.Linq;
using System.Text;
using System.IO;
using System.Reflection;
using static System.Math;
using System.Numerics;
static class Program{
	const int mod=(int)1e9+7;
	const double eps=1e-11;
	static void Main(){
		Sc sc=new Sc();
		var s=sc.La;
		var d=sc.Sa;
		long dn=long.Parse(d[1]);
		var e=sc.Sa;
		long en=long.Parse(e[1]);
		long ans=dn+en-1;
		ans=Min(ans,s[d[0][0]-'A']-dn+s[e[0][0]-'A']-en+1);
		if(d[0]==e[0]){
			ans=Min(ans,Abs(dn-en));
			ans=Min(ans,Min(s[(e[0][0]-'A'+1)%3],s[(e[0][0]-'A'+2)%3])+dn+s[e[0][0]-'A']-en);
			ans=Min(ans,Min(s[(e[0][0]-'A'+1)%3],s[(e[0][0]-'A'+2)%3])+s[d[0][0]-'A']-dn+en);
		}
		else{
			ans=Min(ans,s[d[0][0]-'A']-dn+en+s[((d[0][0]-'A'+1)^(e[0][0]-'A'+1))-1]);
			ans=Min(ans,dn+s[e[0][0]-'A']-en+s[((d[0][0]-'A'+1)^(e[0][0]-'A'+1))-1]);
		}
		Console.WriteLine("{0}",ans);
	}
}

public class Sc{
	public int I{get{return int.Parse(Console.ReadLine());}}
	public long L{get{return long.Parse(Console.ReadLine());}}
	public double D{get{return double.Parse(Console.ReadLine());}}
	public string S{get{return Console.ReadLine();}}
	public int[] Ia{get{return Array.ConvertAll(Console.ReadLine().Split(),int.Parse);}}
	public long[] La{get{return Array.ConvertAll(Console.ReadLine().Split(),long.Parse);}}
	public double[] Da{get{return Array.ConvertAll(Console.ReadLine().Split(),double.Parse);}}
	public string[] Sa{get{return Console.ReadLine().Split();}}
	public object[] Oa{get{return Console.ReadLine().Split();}}
	public int[] Ia2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),int.Parse);}}
	public int[] Ia3(string a,string b){return Array.ConvertAll((a+Console.ReadLine()+b).Split(),int.Parse);}
	public long[] La2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),long.Parse);}}
	public long[] La3(string a,string b){return Array.ConvertAll((a+Console.ReadLine()+b).Split(),long.Parse);}
	public double[] Da2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),double.Parse);}}
	public double[] Da3(string a,string b){return Array.ConvertAll((a+Console.ReadLine()+b).Split(),double.Parse);}
	public T[] Arr<T>(int n,Func<T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f();}return a;}
	public T[] Arr<T>(int n,Func<int,T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(i);}return a;}
	public T[] Arr<T>(int n,Func<string[],T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(Console.ReadLine().Split());}return a;}
	public T[] Arr<T>(int n,Func<int,string[],T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(i,Console.ReadLine().Split());}return a;}
}