static void printPermutation ( int n , int k ) {
  for ( int i = 1 ;
  i <= n ;
  i ++ ) {
    int x = 2 * i - 1 ;
    int y = 2 * i ;
    if ( i <= k ) System . out . print ( y + " " + x + " " ) ;
    else System . out . print ( x + " " + y + " " ) ;
  }
}

static void printPermutation ( int n , int k ) { for ( int i = 1 ; i <= n ; i ++ ) { int x = 2 * i - 1 ; int y = 2 * i ; if ( i <= k ) System . out . print ( y + " ▁ " + x + " ▁ " ) ; else System . out . print ( x + " ▁ " + y + " ▁ " ) ; } }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (binary_expression left: (decimal_integer_literal) right: (identifier)) right: (decimal_integer_literal)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (decimal_integer_literal) right: (identifier)))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (string_literal)) right: (identifier)) right: (string_literal))))) alternative: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (string_literal)) right: (identifier)) right: (string_literal))))))))))