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pick out an element from list
i have a list with n element.i want to pick out an element from the list, and to deduct the element from all the other residual elements. This process is the first step. i must apply all elements of the list, invariably. Namely, in conclusion, i will obtain n list with n-1 elements. now, i will try to explain as numerically. let element number of the list be 2500. and i am picking out the first element of the list. and i'm deducting the first element from the residual elements of the list. and now, i have a list with 2499 elements.after that, i'm passing the second element, and i'm applying the same processes. Ä± can't do this, can anyone help me???