______
                 /      \
                /        \
         ______/     R    \______
        /      \          /      \
       /        \        /        \
      /   S  O   \______/   I  N   \
      \          /      \          /
       \        /        \        /
        \______/          \______/
        /      \          /      \
       /        \        /        \
      /          \______/          \
      \   G  R   /      \   I  O   /
       \        /        \        /
        \______/   I  F   \______/
               \          /
                \        /
                 \______/