numbers = input().split(' ')
text = [m for m in input() if m.isalpha() or m.isspace()]
new_word = ''
curr_sum = 0
indexes = []
for element in numbers:
    for digit in element:
        curr_sum += int(digit)
    indexes.append(curr_sum)
    curr_sum = 0

for index in indexes:
    if index > len(text):
        index = index - len(text)
        new_word += text[index]
    else:
        new_word += text[index]
    text.pop(index)
print(new_word)