public static void main ( String [ ] args ) throws Exception {
  BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ;
  int N = Integer . parseInt ( br . readLine ( ) ) ;
  boolean [ ] rainTimes = new boolean [ 24 * 12 + 1 ] ;
  for ( int i = 0 ;
  i < N ;
  i ++ ) {
    String [ ] rainTime = br . readLine ( ) . split ( "-" ) ;
    int rainFrom = Integer . parseInt ( rainTime [ 0 ] ) ;
    int rainTo = Integer . parseInt ( rainTime [ 1 ] ) ;
    for ( int j = rainFrom / 100 * 12 + ( rainFrom % 100 ) / 5 ;
    j < rainTo / 100 * 12 + ( rainTo % 100 + 4 ) / 5 ;
    j ++ ) {
      rainTimes [ j ] = true ;
    }
  }
  for ( int i = 0 ;
  i < 24 * 12 ;
  i ++ ) {
    if ( ! rainTimes [ i ] ) continue ;
    System . out . print ( String . format ( "%02d%02d-" , i / 12 , i % 12 * 5 ) ) ;
    while ( i < 24 * 12 && rainTimes [ i ] && rainTimes [ i + 1 ] ) i ++ ;
    i ++ ;
    System . out . println ( String . format ( "%02d%02d" , i / 12 , i % 12 * 5 ) ) ;
  }
}

public static void main ( String [ ] args ) throws Exception { BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ; int N = Integer . parseInt ( br . readLine ( ) ) ; boolean [ ] rainTimes = new boolean [ 24 * 12 + 1 ] ; for ( int i = 0 ; i < N ; i ++ ) { String [ ] rainTime = br . readLine ( ) . split ( " - " ) ; int rainFrom = Integer . parseInt ( rainTime [ 0 ] ) ; int rainTo = Integer . parseInt ( rainTime [ 1 ] ) ; for ( int j = rainFrom / 100 * 12 + ( rainFrom % 100 ) / 5 ; j < rainTo / 100 * 12 + ( rainTo % 100 + 4 ) / 5 ; j ++ ) { rainTimes [ j ] = true ; } } for ( int i = 0 ; i < 24 * 12 ; i ++ ) { if ( ! rainTimes [ i ] ) continue ; System . out . print ( String . format ( " % 02d % 02d - " , i / 12 , i % 12 * 5 ) ) ; while ( i < 24 * 12 && rainTimes [ i ] && rainTimes [ i + 1 ] ) i ++ ; i ++ ; System . out . println ( String . format ( " % 02d % 02d " , i / 12 , i % 12 * 5 ) ) ; } }
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(identifier) value: (array_creation_expression type: (boolean_type) dimensions: (dimensions_expr (binary_expression left: (binary_expression left: (decimal_integer_literal) right: (decimal_integer_literal)) right: (decimal_integer_literal)))))) (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: (array_type element: (type_identifier) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) name: (identifier) arguments: (argument_list (string_literal))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: 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(decimal_integer_literal)) right: (decimal_integer_literal)) right: (binary_expression left: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal))) right: (decimal_integer_literal)))) update: (update_expression (identifier)) body: (block (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (true))))))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (binary_expression left: (decimal_integer_literal) right: (decimal_integer_literal))) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (unary_expression operand: (array_access array: (identifier) index: (identifier)))) consequence: (continue_statement)) (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 (string_literal) (binary_expression left: (identifier) right: (decimal_integer_literal)) (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal))))))) (while_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (binary_expression left: (decimal_integer_literal) right: (decimal_integer_literal))) right: (array_access array: (identifier) index: (identifier))) right: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))))) body: (expression_statement (update_expression (identifier)))) (expression_statement (update_expression (identifier))) (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 (string_literal) (binary_expression left: (identifier) right: (decimal_integer_literal)) (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal)))))))))))