2

def quickSort(arr):
    if len(arr) <= 1:
        return arr
    pivot = arr[len(arr) // 2]
    left = [word for word in arr if len(word) < len(pivot)]
    middle = [word for word in arr if len(word) == len(pivot)]
    right = [word for word in arr if len(word) > len(pivot)]
    return quickSort(left) + middle + quickSort(right)

sentence = input().split()
sorted_sentence = quickSort(sentence)
result = " ".join(sorted_sentence)
print(result)