static String findNumber ( int n , int d ) {
  String ans = "" ;
  if ( d != 10 ) {
    ans += Integer . toString ( d ) ;
    for ( int i = 1 ;
    i < n ;
    i ++ ) ans += '0' ;
  }
  else {
    if ( n == 1 ) ans += "Impossible" ;
    else {
      ans += '1' ;
      for ( int i = 1 ;
      i < n ;
      i ++ ) ans += '0' ;
    }
  }
  return ans ;
}

static String findNumber ( int n , int d ) { String ans = " " ; if ( d != 10 ) { ans += Integer . toString ( d ) ; for ( int i = 1 ; i < n ; i ++ ) ans += '0' ; } else { if ( n == 1 ) ans += " Impossible " ; else { ans += '1' ; for ( int i = 1 ; i < n ; i ++ ) ans += '0' ; } } return ans ; }
(method_declaration (modifiers) type: (type_identifier) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (string_literal))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (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: (identifier)) update: (update_expression (identifier)) body: (expression_statement (assignment_expression left: (identifier) right: (character_literal))))) alternative: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (expression_statement (assignment_expression left: (identifier) right: (string_literal))) alternative: (block (expression_statement (assignment_expression left: (identifier) right: (character_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: (character_literal)))))))) (return_statement (identifier))))