map j+k to l and map u+i to o, AutoHotKey script
#UseHook
l::
SendInput, {j Down}
SendInput, {k Down}
KeyWait, l
SendInput, {j Up}
SendInput, {k Up}
Return
o::
SendInput, {u Down}
SendInput, {i Down}
KeyWait, o
SendInput, {u Up}
SendInput, {i Up}
Return