Example with mandatory variables not filled in

---                                                                             
var1: a                       # The first variable                              
var2: a                       # The second variable                             

Example with all variables modifiable

---                                                                             
var1: a                       # The first variable                              
var2: a                       # The second variable                             
var3: a                       # The third variable                              
var4: b                       # The forth variable                              
var5: a                       # The fifth variable                              
var6: 1                       # The sixth variable