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Triangles with pranksters

Instructions:

Insert numbers into empty fields in triangle (grape). The sum of two neighbouring numbers in one row must be equal to number below those fields. You may use only "pranskters" - numbers, which are known and located below triangle (grape).

Example

16
9
1
3
  
10
  
12
  
19
  
22
  
31
  
53
  

Solution

16
3
9
1
19
12
10
31
22
53

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