Four distinct integers $a$, $b$, $c$ and $d$ have the property that when added in pairs, the sums 10, 18, 19, 20, 21, and 29 are obtained. What are the four integers in increasing order? (place a comma and then a space between each integer)
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Four distinct integers $a$, $b$, $c$ and $d$ have the property that when added in pairs, the sums 10, 18, 19, 20, 21, and 29 are obtained. What are the four integers in increasing order? (place a comma and then a space between each integer)
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
4,6,14,15
Four distinct integers $a$, $b$, $c$ and $d$ have the property that when added in pairs, the sums 10, 18, 19, 20, 21, and 29 are obtained. What are the four integers in increasing order? (place a comma and then a space between each integer)
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