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function cellsInRange(s: string): string[] {    const [col1, row1, , col2, row2] = s;    const res: string[] = [];
    for (        let col = col1;        col <= col2;        col = String.fromCharCode(col.charCodeAt(0) + 1)    ) {        for (            let row = row1;            row <= row2;            row = String.fromCharCode(row.charCodeAt(0) + 1)        ) {            res.push(col + row);        }    }
    return res;}export default cellsInRange;