help me pls why i got 21, i cant understand

Question

https://code.sololearn.com/cOSvC5hou2rg/?ref=app

Answer 1

Datu Safiudden

Print the value of a, b, c inside for loop after b = c and see how came 21

print (c, a, b)

Answer 2

Datu Safiudden
Review your range specification, and how it affects your output