In rust programming. Receiving this error in auto grader.

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Test Failed: ' Barry Bill Dubya Poppy Ron ' != 'Barry Bill Dubya Poppy Ron ' -  - Barry Bill Dubya Poppy Ron : Unequal fingerprint groups  Barry Bill Dubya Poppy... 

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Modify code below to solve issue.

use std::collections::HashMap; 

use std::io; 

fn main() { 

 let mut map: HashMap> = HashMap::new(); 

 //Receive Inputs 

 let mut input_lines = Vec::new(); 

 loop { 

 let mut line = String::new(); 

 let read_result = io::stdin().read_line(&mut line); 

 if (read_result.unwrap() == 0) || (line == " ") { 

 break; 

 } 

 input_lines.push(line.trim().to_string()); 

 } 

 //input into hashmap 

 for line in input_lines { 

 let splits: Vec<&str> = line.split_whitespace().collect(); 

 let finger_print = splits[0]; 

 let name = splits[1]; 

 map.entry(finger_print.to_string()).or_insert(Vec::new()).push(name.to_string()); 

 } 

 //print hashmap values 

 for (_key,value) in map.iter(){ 

 for names in value{ 

 println!("{}",names); 

 } 

 if _key != map.keys().last().unwrap(){ 

 println!(" ") 

 } 

 } 

}