function pangrams(myString: string): string {
    // Write your code here
    myString = myString.toLowerCase().trim()
    const s  = new Set(myString.split(''));
    let alpa = 'abcdefghijklmnopqrstuvwxyz'
    for(const data of s) {
        if(alpa.includes(data))  alpa= alpa.replace(data,"")
    }
    return alpa.length === 0 ? 'pangram' : 'not pangram'
}