x,y,z = gets.split.map(&:to_i)
a = Hash.new
a["A"] = x
a["B"] = y
a["C"] = z
s = []
t = []
s[0],t[0] = gets.split
s[1],t[1] = gets.split
t[0] = t[0].to_i
t[1] = t[1].to_i
ans = 10**10
u = [t[0]-1,a[s[0]]-t[0]]
v = [t[1]-1,a[s[1]]-t[1]]
ans = (t[0]-t[1]).abs if (s[0] == s[1]) 
2.times do |i|
    2.times do |j|
        r = u[i]+v[j]+1
        r += [x,y,z].min if i != j
        ans = [ans,r].min
    end
end
puts ans