**''<Direction>''**

''<Direction> == <left>'' || ''<right>'' || ''<as previous>'' || ''<opposite>''

''<left>        =='' **''<''** || **''L''** || **B** 

''<right>       =='' **''>''** || **''R''** || **''J''** 

''<as previous> =='' **''+''** || **''F''** || **''A''** 

''<opposite>    =='' **''-''** || **''C''** || **''T''** || **''X''** || **''X''** || **''V''**

The direction of trains.

Only the above abbreviations may be used. 

The "as previous" an "opposite" meanings use the direction on the same line / in the same group. If the movement stays alone, it is not part of a group or a line, then these values generate a random direction.