# exercise 6 - lab 2 - Tìm ký tự xuất hiện nhiều nhất, ít nhất trong s s = "tung beo is me, tao la tung beo, 19" most_appear_char = s[0] least_appear_char = s[0] max_count = s.count(s[0]) min_count = s.count(s[0]) for ch in s: if s.count(ch) > max_count: most_appear_char = ch max_count = s.count(ch) if s.count(ch) < min_count: least_appear_char = ch min_count = s.count(ch) print('char \'%s\' appears %d times\nchar \'%s\' appears %d times' % (most_appear_char, max_count, least_appear_char, min_count))