list_exp = list(map(str, input().split()))
list1= list(input())
n =len(list1)
for i in range(0,n):
    if(list1[i]==list_exp[1]):
        list1[i]=list_exp[2] 
    elif(list1[i]==list_exp[3]):
        list1[i]=list_exp[4]
    else:
        continue
print(''.join(list1))