正则表达式：(..+)(?=.*?(\1))

的数据
参考文献

const regex = /(..+)(?=.*?(\1))/gm;

// Alternative syntax using RegExp constructor
// const regex = new RegExp('(..+)(?=.*?(\\1))', 'gm')

const str = `0z8b816ne139z1b948bjk50f9498t139gjj90t7tb3509w6h0r7tbp
`;
let m;

while ((m = regex.exec(str)) !== null) {
    // This is necessary to avoid infinite loops with zero-width matches
    if (m.index === regex.lastIndex) {
        regex.lastIndex++;
    }
    
    // The result can be accessed through the `m`-variable.
    m.forEach((match, groupIndex) => {
        console.log(`Found match, group ${groupIndex}: ${match}`);
    });
}

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