Move every value along – Python Exercise with Solution

Move each of three values one place to the left.

What to build

A program that changes what three variables hold.

Requirements

Read a, b and c.
Change them so that a holds the old b, b holds the old c, and c holds the old a.
Print a, b and c on one line, separated by spaces.

Input

Three lines, each with one word.

Output

One line with the three words in their new places.

Constraints

Each line holds exactly one word.

Example

Input:

x
y
z

Output:

y z x

Why it works

Python works out the whole right side first, so a, b, c = b, c, a sees all the old values at once. Doing it in separate lines would lose one of them.

Examples

Example 1 · Input

x
y
z

Expected output

y z x

Example 2 · Input

one
two
three

Expected output

two three one

Prompts inside input() are ignored when checking, so input("n: ") is fine.

Hints

Hint 1

You need all three values at once before you can move them.

Hint 2

a, b, c = b, c, a moves them in one line.

Solution

Show one correct solution (try it yourself first)

a = input()
b = input()
c = input()
a, b, c = b, c, a
print(a, b, c)

Lesson: Variables and assignment →