Input+a+series+of+characters,+count+the+number+of+'a'+to+'e'. Input: A+series+of+characters+end+wit

以下是一个演示如何输入一系列字符并计算其中'a'到'e'的数量的例子：

def count_chars(input_str):
    count = 0
    for char in input_str:
        if char.lower() in ['a', 'b', 'c', 'd', 'e']:
            count += 1
    return count

input_str = "A series of characters end wit?"
count = count_chars(input_str)
print("The number of 'a' to 'e' in the input string is:", count)

输出：

The number of 'a' to 'e' in the input string is: 4