Aninstructorinchemicalwarfareaskedsoldiersinhisclass:"Anyoneknowstheformulaforwater?"
"Sure.That‘seasy,"saidoneman.
"Whatisit?"
"H,I,J,K,L,M,N,O."
"What,what?"reaskedtheinstructor.
"HtoO,"explainedthechemistryexpert.