public static void main ( String [ ] args ) {
  Scanner input = new Scanner ( System . in ) ;
  String s = input . next ( ) ;
  int a = input . nextInt ( ) ;
  char c = s . charAt ( 0 ) ;
  char t = s . charAt ( 1 ) ;
  char g = s . charAt ( 3 ) ;
  char f = s . charAt ( 4 ) ;
  String h = c + "" + t ;
  String v = g + "" + f ;
  int n = Integer . parseInt ( h ) ;
  int y = Integer . parseInt ( v ) ;
  int b = ( ( n * 60 + y + a ) % 1440 ) ;
  if ( b / 60 < 10 && b % 60 >= 10 ) {
    System . out . println ( "0" + b / 60 + ":" + b % 60 ) ;
  }
  if ( b / 60 >= 10 && b % 60 < 10 ) {
    System . out . println ( b / 60 + ":" + "0" + b % 60 ) ;
  }
  if ( b / 60 >= 10 && b % 60 >= 10 ) {
    System . out . println ( b / 60 + ":" + b % 60 ) ;
  }
  if ( b / 60 < 10 && b % 60 < 10 ) {
    System . out . println ( "0" + b / 60 + ":" + "0" + b % 60 ) ;
  }
}

public static void main ( String [ ] args ) { Scanner input = new Scanner ( System . in ) ; String s = input . next ( ) ; int a = input . nextInt ( ) ; char c = s . charAt ( 0 ) ; char t = s . charAt ( 1 ) ; char g = s . charAt ( 3 ) ; char f = s . charAt ( 4 ) ; String h = c + " " + t ; String v = g + " " + f ; int n = Integer . parseInt ( h ) ; int y = Integer . parseInt ( v ) ; int b = ( ( n * 60 + y + a ) % 1440 ) ; if ( b / 60 < 10 && b % 60 >= 10 ) { System . out . println ( "0" + b / 60 + " : " + b % 60 ) ; } if ( b / 60 >= 10 && b % 60 < 10 ) { System . out . println ( b / 60 + " : " + "0" + b % 60 ) ; } if ( b / 60 >= 10 && b % 60 >= 10 ) { System . out . println ( b / 60 + " : " + b % 60 ) ; } if ( b / 60 < 10 && b % 60 < 10 ) { System . out . println ( "0" + b / 60 + " : " + "0" + b % 60 ) ; } }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (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)))))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal))))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (binary_expression left: (identifier) right: (string_literal)) right: (identifier)))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (binary_expression left: (identifier) right: (string_literal)) right: (identifier)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (parenthesized_expression (binary_expression left: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (identifier)) right: (identifier))) right: (decimal_integer_literal))))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal)) right: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal)))) consequence: (block (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: (string_literal) right: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (string_literal)) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))))))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal)) right: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal)))) consequence: (block (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: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (string_literal)) right: (string_literal)) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))))))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal)) right: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal)))) consequence: (block (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: (decimal_integer_literal)) right: (string_literal)) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))))))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal)) right: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal)))) consequence: (block (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: (binary_expression left: (string_literal) right: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (string_literal)) right: (string_literal)) right: (binary_expression left: (identifier) right: (decimal_integer_literal))))))))))