^
              / \
             /   \
            /loop \
           /       \
          ^---------^
         /]\       / \
        ^---^      ---^
       / \ /a\       / \
      /set\---      /   \
     ^-----^       /?    \
    /a\   /l\     ^-------^
    ---  /ine\   /!\     / \
         -----  ^---    /out\
               / \      -----^
              /   \         / \
             /     \       /arg\
            /       \     ^-----^
           /         \   /a\   /4\
          /?          \  ---   ---
         ^-------------^
        / \           / \
       /   \         /out\
      /     \        -----^
     /=      \           / \
    ^---------^         /arg\
   / \       / \       ^-----^
  /arg\     /arg\     /a\   /2\
 ^-----^   ^-----^    ---   ---
/a\   /1\ /a\   /2\
---   --- ---   ---