a_list = [3,2,1,2,4,3,1,3,1,1,3,1,3,2,1,2,2,2,1,2,1,1,1,2,2,1]
a=input()
A,B=list(map(list,input().split()))
a=""
cnt = 0
while len(A)>cnt or len(B)>cnt:
if len(A)>cnt:
a += A[cnt]
if len(B)>cnt:
a += B[cnt]
cnt+=1
k1 = []
k2 = []
for i in a:
k1.append(a_list[ord(i)-65])
while len(k1) > 2:
k2=[]
for i in range(0,len(k1)-1):
k2.append((k1[i]+k1[i+1])%10)
k1 = k2[:]
S=0
for i in k1:
S*=10
S+=i
print(str(S)+"%")