Read the stack trace provided below and determine which line originally throws an exception.
Exception in thread "main" java.lang.NumberFormatException: For input string: "121a"
at java.base/java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.base/java.lang.Integer.parseInt(Integer.java:652)
at java.base/java.lang.Integer.parseInt(Integer.java:770)
at NumberFormatExceptionDemo.main(NumberFormatExceptionDemo.java:9)