def triple(nums):

import copy

nummpa= {}

resp = []

resp_str = []

nums = sorted(nums)

for i in nums:

if i in nummpa.keys():

nummpa[i] +=1

else:

nummpa[i] = 1

for i,j in enumerate(nums):

for k,l in enumerate(nums):

if k > i:

sum = j+l

if sum*-1 in nummpa.keys():

if sum*-1 ==l:

if nummpa[l] <=1:

break

if sum*-1 ==j:

if nummpa[j] <=1:

break

if sum*-1 == l and sum*-1 ==j:

print ("all same ",nummpa[l])

if nummpa[l] <= 2:

break

rstr = ''.join(str(o) for o in sorted([j,l,sum*-1]))

if rstr in resp_str:

continue

else:

resp_str.append(rstr)

resp.append(sorted([j,l,sum*-1]))

print(resp)

return resp