messaging

list_numbers = input().split()
text = input()
sum_digits = 0
new_message = ""
for number in list_numbers:
    for index in range(len(number)):
        sum_digits += int(number[index])

    if sum_digits >= len(text):
        sum_digits -= len(text)
        new_message += text[sum_digits]
        text = text.replace(text[sum_digits], "", 1)

    else:
        new_message += text[sum_digits]
        text = text.replace(text[sum_digits], "", 1)

    sum_digits = 0

print(new_message)