Hallo Vincor sifu....what do u mean by F1, F2, F3 n F4 guppies

cos now i hav how many kinds of guppies oso i didnt know

i just buy n mix them all together but of course with the ratio 1 male to 2 female....
rite now male i have those colourful 1 n the female i have the 1 with the red eye which its sizes r not so big and another female kinda like the red eye but it is without red eye n its size is a little bigger

can i mix all of them together n will they out cross???