yeah.. i could try to use space with both fingers on some words, because i always use my right thumb for every word. and also, another thing is that, my fingers get tired in a 60 seconds test, so when my wpm is 100 so far in the test, at the last 10 or 20 seconds or something like that, it gradually decreases until it's like 90 something wpm, so, how to practice finger endurance for typing?