top_command (cmd_load currentFile [])
goal_command 0 cmd_make_case "b₂ b₁"
goal_command 1 cmd_make_case "xs i"
goal_command 2 cmd_make_case "a b c d e"
goal_command 3 cmd_make_case "n i j"
goal_command 4 cmd_make_case "i n"