const aToZ =  [...Array<string>(26)].map( ( _ , index) => {
    return String.fromCharCode(index + 65)
 })

 class Panagram {
     value: string
     constructor(input: string = "") {
         this.value = input
     }

     isPangram(): boolean {
        // create dictionay and fill it with the alphabet
        const myMap = new Map<string, number>()
        aToZ.forEach((key: string) => {
            myMap.set(key.toLowerCase(), 0)
        })

        for (const each of this.value) {
            const value = myMap.get(each) || 0
            myMap.set(each.toLowerCase(), value + 1 )
        }

        for (const each of myMap.values()) {
            if (each === 0 ) {
                return false
            }
        }
        return true
     }
}

export default Panagram