// Package pangram is for finding pangrams. Pangram is a set of characters which
// contains all letters from the alphabet.
package pangram
import "strings"
const alphabet = "abcdefghijklmnopqrstuvwxyz"
// IsPangram returns true if input is a pangram.
func IsPangram(input string) bool {
	if len(input) < len(alphabet) {
		return false
	}
	input = strings.ToLower(input)
	for _, ch := range alphabet {
		if strings.ContainsRune(input, ch) {
			continue
		}
		return false
	}
	return true
}