# Learn Algorithm Design by Building a Shortest Path Algorithm - Step 15

### Tell us what’s happening:

Describe your issue in detail here.

``````
# User Editable Region

my_graph = {
'A': ['3', '1'],

# User Editable Region

'B': ['A', 'C'],
'C': ['B', 'D'],
'D': ['A', 'C']
}

``````

User Agent is: `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36`

### Challenge Information:

Learn Algorithm Design by Building a Shortest Path Algorithm - Step 15

You appear to have created this post without editing the template. Please edit your post to Tell us what’s happening in your own words.
Learning to describe problems is hard, but it is an important part of learning how to code.
Also, the more you say, the more we can help!

how it is work i dont understand

my_graph = {
‘A’: [‘3’, ‘1’],
it is uncorrect

You were given this original piece:

``````my_graph = {
'A': ['B', 'D'],
``````

Don’t remove value ‘B’ or ‘D’, just make them a tuple `(.., ...) `, using those values and the other values in the table given.

``````Edge 	Weight
A-B 	3
B-C 	4
C-D 	7
D-A 	1
``````

show me one example, I can’t do it

Do you remember what a tuple is from previous Steps?

You need to turn those 2 strings `'B'` and `'D'` into 2 tuples.

– solution removed by mod —

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