TASK_14

from math import ceil


def sentenceChange(sentence, position):
    newString = ""
    tempString = ""
    length = len(sentence)
    if length == 1:
        return sentence
    else:
        loopTimes = int(ceil(length / position))
        newString = sentence[0]
        start = 1
        end = position
        removeIndex = 0
        for i in range(0, loopTimes):
            if removeIndex !=0 and removeIndex < length:
                tempString += sentence[removeIndex]
            newString += sentence[start:end]
            start += position
            end += position
            removeIndex += position

    newString += tempString

    return newString


sentence = input()
position = int(input())
print(sentenceChange(sentence, position))