Base cases
if ( l == 0 ) : NEW_LINE INDENT print ( " empty ▁ string " ) NEW_LINE return NEW_LINE DEDENT if ( l > 4 ) : NEW_LINE INDENT print ( " Length ▁ more ▁ than ▁ 4 ▁ is ▁ not ▁ supported " ) NEW_LINE return NEW_LINE DEDENT