import sys

'''
matrix[[G,Ci],
       [C,Pi],
       [P,Gi]]
'''
com=[[],[],[]]
nums=[0,0,0]
N=0

num=input().split()
for i in range(3):
    com[i].append(int(num[i]))
    N+=int(num[i])
str=input()

for i in range(N):
    if str[i] == 'C':
        nums[0]+=1
    if str[i] == 'P':
        nums[1]+=1
    if str[i] == 'G':
        nums[2]+=1

for i in range(3):
    com[i].append(nums[i])

win=min(com[0])+min(com[1])+min(com[2])
drr=min((com[0][0]-min(com[0])),(com[2][1]-min(com[2])))\
   +min((com[1][0]-min(com[1])),(com[0][1]-min(com[0])))\
   +min((com[2][0]-min(com[2])),(com[1][1]-min(com[1])))

print(3*win+drr)