Hello children, it's time for an important lesson with Professor Flans.   This is about four letters that people sometimes confuse for one: LMNO!      LMNO   Are four letters   LMNO   Are not one      L   L M   L M NM N Ohhhhhh!   LMNO   L M N Ohhhhhh!   LMNO      LMNO   Are four letters   LMNO   Are not one      LMNO      L M N Ohhhhhh!   LMNO   L M N Ohhhhhh!   LMNO