#50BeginnerGetting Started· Input and Output

Hello World & Input/Output

A first interactive program asks for a name and an age, then answers with a greeting and the year the person was born. In a script you would read those values with `input()`. Here the two answers arrive as arguments, exactly as `input()` would hand them to you: as text. Write `greet_user(name, age_text, current_year)` that returns one line of text: - Remove spaces around `name`. If nothing is left, call the person `friend`. - Remove spaces around `age_text`. If what is left is made only of digits, the person is that many whole years old. Since you don't know whether their birthday has passed this year, they were born in `current_year - age - 1` or `current_year - age`. Return `Hello, <name>! You were born in <earlier year> or <later year>.` - Otherwise (letters, a decimal point, a minus sign or an empty answer) return `Hello, <name>! I could not read your age.`

Input format

`name`: the text typed for the name. `age_text`: the text typed for the age. `current_year`: an integer.

Output format

A single string, exactly as described.

Examples

Input: name = "Ada", age_text = "36", current_year = 2026

Output: "Hello, Ada! You were born in 1989 or 1990."

36 years before 2026 is 1990; if the birthday has not happened yet this year, it was 1989.

Input: name = " Grace ", age_text = "ten", current_year = 2026

Output: "Hello, Grace! I could not read your age."

The name is trimmed. "ten" is not made of digits, so the age cannot be read.

Constraints

0 <= len(name), len(age_text) <= 50
1900 <= current_year <= 2100
A valid age has at most 3 digits

Study first

Introduction to Python

#python
#basics
#io
#f-strings