why does "line" in Hand view sometimes contain 4 letters

[donjunior]

hey there,

i didn't find an answer for this on the forum. (didn't know the right keywords maybe)
but i would like to know why there are sometimes four letters in the line area of the hand viewer.
i have some hands there which were played C,C,X. why does it say C,C,C,X?

[donjunior]

Ah never mind. Thought the line contained only postflop action, but it sure does contain preflop action as well.
Can be closed!