static void MinSteps ( int SourceX , int SourceY , int DestX , int DestY ) {
  System . out . println ( Math . max ( Math . abs ( SourceX - DestX ) , Math . abs ( SourceY - DestY ) ) ) ;
  while ( ( SourceX != DestX ) || ( SourceY != DestY ) ) {
    if ( SourceX < DestX ) {
      System . out . print ( 'U' ) ;
      SourceX ++ ;
    }
    if ( SourceX > DestX ) {
      System . out . println ( 'D' ) ;
      SourceX -- ;
    }
    if ( SourceY > DestY ) {
      System . out . print ( 'L' ) ;
      SourceY -- ;
    }
    if ( SourceY < DestY ) {
      System . out . print ( 'R' ) ;
      SourceY ++ ;
    }
    System . out . println ( ) ;
  }
}

static void MinSteps ( int SourceX , int SourceY , int DestX , int DestY ) { System . out . println ( Math . max ( Math . abs ( SourceX - DestX ) , Math . abs ( SourceY - DestY ) ) ) ; while ( ( SourceX != DestX ) || ( SourceY != DestY ) ) { if ( SourceX < DestX ) { System . out . print ( ' U ' ) ; SourceX ++ ; } if ( SourceX > DestX ) { System . out . println ( ' D ' ) ; SourceX -- ; } if ( SourceY > DestY ) { System . out . print ( ' L ' ) ; SourceY -- ; } if ( SourceY < DestY ) { System . out . print ( ' R ' ) ; SourceY ++ ; } System . out . println ( ) ; } }
(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)) (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (identifier)))) (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (identifier))))))))) (while_statement condition: (parenthesized_expression (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) right: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (character_literal)))) (expression_statement (update_expression (identifier))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (character_literal)))) (expression_statement (update_expression (identifier))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (character_literal)))) (expression_statement (update_expression (identifier))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (character_literal)))) (expression_statement (update_expression (identifier))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list)))))))