public static void main ( String [ ] args ) {
  final Scanner sc = new Scanner ( System . in ) ;
  char [ ] s = sc . next ( ) . toCharArray ( ) ;
  int count = 1 ;
  char now = s [ 0 ] ;
  String ans = "" ;
  for ( int i = 1 ;
  i < s . length ;
  i ++ ) {
    if ( now == s [ i ] ) {
      count ++ ;
    }
    else {
      ans += now + "" + count ;
      now = s [ i ] ;
      count = 1 ;
    }
  }
  ans += now + "" + count ;
  System . out . println ( ans ) ;
}

public static void main ( String [ ] args ) { final Scanner sc = new Scanner ( System . in ) ; char [ ] s = sc . next ( ) . toCharArray ( ) ; int count = 1 ; char now = s [ 0 ] ; String ans = " " ; for ( int i = 1 ; i < s . length ; i ++ ) { if ( now == s [ i ] ) { count ++ ; } else { ans += now + " " + count ; now = s [ i ] ; count = 1 ; } } ans += now + " " + count ; System . out . println ( ans ) ; }
(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 (modifiers) 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: (array_type element: (integral_type) 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)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (array_access array: (identifier) index: (decimal_integer_literal)))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (string_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: (field_access object: (identifier) field: (identifier))) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (array_access array: (identifier) index: (identifier)))) consequence: (block (expression_statement (update_expression (identifier)))) alternative: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (binary_expression left: (identifier) right: (string_literal)) right: (identifier)))) (expression_statement (assignment_expression left: (identifier) right: (array_access array: (identifier) index: (identifier)))) (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal))))))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (binary_expression left: (identifier) right: (string_literal)) right: (identifier)))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))