A method is disclosed that allows the production of peptides having three or more amino acid residues easily, inexpensively and at high yield without going through a complex synthesis method. The microwave bandpass filter includes a cavity and three or more resonators arranged in a row in the cavity. A user operating either the first or second lifting mechanism may cause lifting and lowering of either portion of the corral system connected thereto. For example, a recording density and coding scheme deemed appropriate for a relatively large recording head-to-media separation can be used for the \u201crougher\u201d side of a two-sided tape, and the highest recording density achievable can be used for the \u201cbest\u201d or smoothest side of the two-sided tape. Based on the comparison, trips associated with the code phases are detected. According to one embodiment, the price is increased by a predetermined amount based on the received indication.