On the internet, a common joke is to trick a person into clicking a link to a song named "Never Gonna Give You Up" by Rick Astley.
Evan notices that links going to "Never Gonna Give You Up" often contain a permutation of the string dQw4w9WgXcQ
. Evan wants to avoid being tricked into clicking a link to this song. Can you write him a program to check if a link goes to "Never Gonna Give You Up"?
Input Specification
Each test case contains one line of text with a length of
characters or less, containing alphanumeric characters.
Output Specification
Output rickroll
if the link goes to "Never Gonna Give You Up".
Output not a rickroll
if the link does not go to "Never Gonna Give You Up".
Sample Input
C1cEF50Rn0cxDnPg4WX9cwwQQdnjutTS2FXE
Sample Output
rickroll
Comments
bread
hmmm...