s = "MM is year day"
try:
    num = int(input("請輸入"))
except ValueError:
    num = int(input("輸入錯誤,請輸入一個正確的數字"))

n = ord(input('輸入一個字母,轉化為asc值'))
ch = chr(98)
print(num)
print(n)
print(ch)
 

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