{"ScriptPreparationCode":"const sentence = \u0027Mastering JS is a very helpful website\u0027;","TestCases":[{"Name":"Substring","Code":"const sentence = \u0027Mastering JS is a very helpful website\u0027;\r\nsentence.substring(12, 0);","IsDeferred":false},{"Name":"Slice","Code":"const sentence = \u0027Mastering JS is a very helpful website\u0027;\r\nsentence.slice(0, 12);","IsDeferred":false}]}