rougail:
  string1_dyn:
    var1: string1
    var2: string1
    var3: string1
    var4: string1
  string2_dyn:
    var1: string1
    var2: string1
    var3: string1
    var4: string1
  string3_dyn:
    var1: string1
    var2: string1
    var3: string1
    var4: string1