how can you...

how can you...
how can you "sm_ile"
without "i"??????
how can you be "f_ne"
without "i"?????
how can you "w_sh"
without "i"?????
how can you be "fr_end"
without "i"????
"i" am very important!
but this "i" can never achieve "s_ccess" without "u"???