[a b c d e]
[a b]

[a [b [c [d [e]]]]]
[a [b]]

Exception in thread "main" java.lang.NullPointerException
	at java.io.StringReader.<init>(StringReader.java:50)
	at clojure.lang.RT.readString(RT.java:1727)
	at clojure.core$read_string.invoke(core.clj:3417)
	at user$eval6$fn__7.invoke(prog.clj:9)
	at clojure.core$repeatedly$fn__4724.invoke(core.clj:4632)
	at clojure.lang.LazySeq.sval(LazySeq.java:42)
	at clojure.lang.LazySeq.seq(LazySeq.java:60)
	at clojure.lang.RT.seq(RT.java:475)
	at clojure.core$seq.invoke(core.clj:133)
	at clojure.core$map$fn__4226.invoke(core.clj:2479)
	at clojure.lang.LazySeq.sval(LazySeq.java:42)
	at clojure.lang.LazySeq.seq(LazySeq.java:60)
	at clojure.lang.Cons.next(Cons.java:39)
	at clojure.lang.RT.next(RT.java:589)
	at clojure.core$next.invoke(core.clj:64)
	at clojure.core$dorun.invoke(core.clj:2781)
	at clojure.core$doall.invoke(core.clj:2796)
	at user$eval6.invoke(prog.clj:9)
	at clojure.lang.Compiler.eval(Compiler.java:6618)
	at clojure.lang.Compiler.load(Compiler.java:7062)
	at clojure.lang.Compiler.loadFile(Compiler.java:7019)
	at clojure.main$load_script.invoke(main.clj:286)
	at clojure.main$script_opt.invoke(main.clj:348)
	at clojure.main$main$fn__6676.invoke(main.clj:432)
	at clojure.main$main.doInvoke(main.clj:429)
	at clojure.lang.RestFn.invoke(RestFn.java:408)
	at clojure.lang.Var.invoke(Var.java:415)
	at clojure.lang.AFn.applyToHelper(AFn.java:161)
	at clojure.lang.Var.applyTo(Var.java:532)
	at clojure.main.main(main.java:37)