static String longestPrefixSuffix ( String s ) {
  int len = LengthlongestPrefixSuffix ( s ) ;
  String prefix = "" ;
  for ( int i = 0 ;
  i < len ;
  i ++ ) prefix += s . charAt ( i ) ;
  return prefix ;
}

static String longestPrefixSuffix ( String s ) { int len = LengthlongestPrefixSuffix ( s ) ; String prefix = " " ; for ( int i = 0 ; i < len ; i ++ ) prefix += s . charAt ( i ) ; return prefix ; }
(method_declaration (modifiers) type: (type_identifier) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation name: (identifier) arguments: (argument_list (identifier))))) (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: (identifier)) update: (update_expression (identifier)) body: (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))))) (return_statement (identifier))))