Code is not working

sir i am trying a challenge of wave print row wise.
in which the code is running on coding blocs ide and netbeans.but showing error in challenge ide.
code is https://ide.codingblocks.com/s/121531
pleasesee it and solve

Your code is correct, it is showing error because you are printing ‘End’ instead of ‘END’. Make this change and your test cases will pass.