public static boolean checkPangrams(String s){
		
		String allAlphabets = "abcdefghijklmnopqrstuvwxyz";
		boolean[] b = new boolean[26];
		char[] charArray = s.toCharArray();
		for(char c: charArray) {
			if(c >=97 && c <=122) {
				if(!b[allAlphabets.indexOf(c)]) {
					b[allAlphabets.indexOf(c)] = true;
				}
			}
		}
		
		for(int i=0;i<b.length;i++) {
			if(b[i] != true) {
				return false;
			}
		}
		
		return true;
	}