import sys
input=lambda: sys.stdin.readline().rstrip()
x,y,z=map(int,input().split())
S0,t0=map(str,input().split())
S1,t1=map(str,input().split())
t0,t1=int(t0),int(t1)

if S0=="A" and S1=="A":
  if t0>t1:
    t0,t1=t1,t0
  print(min(t1-t0,t0+y+(x-t1),t0+z+(x-t1)))
elif S0=="A" and S1=="B":
  print(min(t0+t1-1,t0+z+(y-t1),(x-t0)+1+(y-t1),(x-t0)+z+t1))
elif S0=="A" and S1=="C":
  print(min(t0+t1-1,t0+y+(z-t1),(x-t0)+1+(z-t1),(x-t0)+y+t1))
elif S0=="B" and S1=="A":
  t0,t1=t1,t0
  print(min(t0+t1-1,t0+z+(y-t1),(x-t0)+1+(y-t1),(x-t0)+z+t1))
elif S0=="B" and S1=="B":
  if t0>t1:
    t0,t1=t1,t0
  print(min(t1-t0,t0+x+(y-t1),t0+z+(y-t1)))
elif S0=="B" and S1=="C":
  print(min(t0+t1-1,t0+x+(z-t1),(y-t0)+1+(z-t1),(y-t0)+x+t1))
elif S0=="C" and S1=="A":
  t0,t1=t1,t0
  print(min(t0+t1-1,t0+y+(z-t1),(x-t0)+1+(z-t1),(x-t0)+y+t1))
elif S0=="C" and S1=="B":
  t0,t1=t1,t0
  print(min(t0+t1-1,t0+x+(z-t1),(y-t0)+1+(z-t1),(y-t0)+x+t1))
else:
  if t0>t1:
    t0,t1=t1,t0
  print(min(t1-t0,t0+x+(z-t1),t0+y+(z-t1)))