nums = list(map(int, input().split(",")))
n = len(nums)
res = []
if (not nums or n < 3):
    print([])
    exit(0)
nums.sort()
for i in range(n):
    if (nums[i] > 0):
        print(res)
        exit(0)
    if (i > 0 and nums[i] == nums[i - 1]):
        continue
    left = i + 1
    right = n - 1
    while __________:
        if nums[i] + nums[left] + nums[right] == 0:
            res.append([nums[i], nums[left], nums[right]])
            while left < right and nums[left] == nums[left + 1]:
                left = left + 1
            while __________:
                right = right - 1
            left = left + 1
            right = right - 1
        elif nums[i] + nums[left] + nums[right] > 0:
            right = right - 1
        else:
            __________
print(res)