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        // 3. Are there employees which have exactly the same combination of computers? (incl. brand and model)
        // for example: Employee X has [Apple MBP 13 and Lenovo K570] \
        //                                                              true
        //         Employee Y has [Lenovo K570 and Apple MBP 13] /
        //
        // but: Employee A has [Apple MBP 13, Apple MBP 15, Lenovo K570] \
        //
        //false
        //    Employee B has [Apple MBP 13, Apple MBP 15].             /