Wave print TEST CASE rejected

[suvinkrsingh_76edd42ef2e76113 (Suvin Singh)]

Code seems to work all right but isn’t able to pass a test case.

[talhashamim001 (Talha Shamim)]

hi @suvinkrsingh_76edd42ef2e76113,
output contains ", " (with comma) not only " " (space) just include that