public static void main ( String [ ] args ) throws Exception {
  Scanner sc = new Scanner ( System . in ) ;
  for ( int i = 0 ;
  i < 3 ;
  i ++ ) {
    char s = sc . next ( ) . charAt ( 0 ) ;
    int diff = 'a' - 'A' ;
    System . out . print ( ( char ) ( s - diff ) ) ;
  }
}

public static void main ( String [ ] args ) throws Exception { Scanner sc = new Scanner ( System . in ) ; for ( int i = 0 ; i < 3 ; i ++ ) { char s = sc . next ( ) . charAt ( 0 ) ; int diff = ' a ' - ' A ' ; System . out . print ( ( char ) ( s - diff ) ) ; } }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) (throws (type_identifier)) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (field_access object: (identifier) field: (identifier)))))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (decimal_integer_literal)) update: (update_expression (identifier)) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) name: (identifier) arguments: (argument_list (decimal_integer_literal))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (character_literal) right: (character_literal)))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (cast_expression type: (integral_type) value: (parenthesized_expression (binary_expression left: (identifier) right: (identifier)))))))))))