Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to make membrillo (quince paste ) [title] Prepare the quinces for cooking. [step] Thoroughly wash the quince fruits. Peel and cut the flesh into cubes.

Ending1: Place them on a cutting board cut thin as per the purée, and place in a floured pot. [title] Place the quinces into a salted water solution. Ending2: [title] Transfer the fruit cubes and water (lemon, grapefruit, lime) into a bowl with the quinces and water. [step] Marinate the fruit and water cubes for 15 to 30 minutes or until it is firm, but not too hard. Ending3: Discard the stem and any fruit that is less than perfect. [substeps] Sometimes quinces that look beautiful outside can have brown parts inside or they might contain a visitor (like a worm). Ending4: Drain the rinds in a colander. [title] Combine the ingredients in a medium saucepan.

Answer format: ending1/ending2/ending3/ending4