What are the letter?

[welshman90]

When i look at formations on here i see some people posting with a letter next to the number like 3w-1-3n-1-2 what do they mean?

[Leandra Marina]

w = wide, mean the player are on flanks
n = narrow, mean the player are close together (center)

[welshman90]

w = wide, mean the player are on flanks
n = narrow, mean the player are close together (center)

Thanks, been bugging me for ages