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<html><head> <meta charset="utf-8"> <title>JS Bin</title></head><body></body></html>const testCases = [ ['1', true], ['1234', true], ['1221', true], ['3333', true], ['143332', true], ['22234', true], ['2234', true], ['22214', true], ['1221441', true], ['41233', true], ['13', false], ['1224', false], ['121', false], ['12221', false], ['43221', false]];const golf = s=>!/13|24|31|42|3(2|4)\11|4(1|3)\22|1(2|4)\33|2(1|3)\44|(.).\5/.test(s.replace(/(.)(\1\1)+/g,"$1"));testCases.forEach(c => { let e = c[1]; let a = golf(c[0]); console.log(c[0] + ': ' + (a === e ? 'pass' : `fail (expected ${e}, got ${a})`));});
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