function gridChallenge(grid: string[]): string {
    let newG = grid.map((g) => {
        return g.split("").sort()
    })
    
    let row = newG.length
    let col = newG[0].length

    for (let i = 0; i < col; i++) {
        for (let j = 1; j < row; j++) {
            if (newG[j -1 ][i] > newG[j][i]) {
                return 'NO'
            }
        }
    }
    
    return 'YES'
}