What does this error message mean and how do i solve the issue?

I started learning java very recently and am pretty confused with scanners and input in general. For this example, my output is exactly what it needs to be but I get an odd error message, what does this mean and what is my mistake?

The code, sorry if it looks terribly unorganized but it's my first time with something this long.

import java.util.*;
class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String a = sc.next();
String b = sc.next();
String c = sc.next();
String d = sc.next();
String e = sc.next();
String f = sc.next();
String g = sc.next();
String h = sc.next();
String i = sc.next();
String j = sc.next();
String k = sc.next();
String l = sc.next();
String m = sc.next();
String n = sc.next();
String o = sc.next();
String p = sc.next();
System.out.println(h);
System.out.println(g);
System.out.println(f);
System.out.println(e);
System.out.println(d);
System.out.println(c);
System.out.println(b);
System.out.println(a);
System.out.println(p);
System.out.println(o);
System.out.println(n);
System.out.println(m);
System.out.println(l);
System.out.println(k);
System.out.println(j);
System.out.println(i);
}
}

The error message:

Failed test #1 of 3. Runtime error
Exception in thread "main" java.util.NoSuchElementException
at java.base/java.util.Scanner.throwFor(Scanner.java:937)
at java.base/java.util.Scanner.next(Scanner.java:1478)
at Main.main(Main.java:15)

In the test #1 of 3, perhaps no elements are passed to your program in that point.

You should check, calling the hasNext() method before accessing the next element:

if (sc.hasNext()) {
value = sc.next();
}

From the official Java documentation:

Throws:
NoSuchElementException - if no more tokens are available

This exception means, that there is no value to read for the Scanner from the input on invoking sc.next() method.

So, you are trying to read more items then input stream has.
Scanner has method hasNext() which returns boolean to indicate if there still something to read in the stream.

You can rewrite your example, like this:

public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
while (sc.hasNext()) {
System.out.println(sc.next());
}
}

This code will read as many values as your input stream has and print them to the console.