private static boolean isPangram(String in) {

		int []arr = new int[26];
		int BASE_A = 'a';
		in.trim();
		in=in.toLowerCase();
		in=in.replace(" ","");
		char []chars = in.toCharArray();
		
		for(char ch : chars){
			int c = ch;
			arr[c-BASE_A] = 1;
		}
		
		boolean flg = true;
		int i = 0;
		while(flg && i<26){
			if(arr[i]==0){
				flg=false;
				return false;
			}
			i++;
		}
		
		return true;
	}