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Question

try to make a solution for the following problem: for you have a set A={1,2,3,4,5,6,7,8,9,10} and i need to make all possible combination between 1,2,3,4,..,or 9 elements for example: i need the output in case of combination of two elements to be as follows:- {1,2}{ 1,3} {1,4} {1,5} .... {1,10} {2,3} {2,4} ...... {2,10} ... etc..