It is 0 19.
The stroke of a match is straight, so a match is one. Have the matches burned out? Is zero. The shape of the match after burning is like the number 9. Matches are kindling tools that are ignited by friction based on the principle that objects generate heat by friction, using the chemical activity of strong oxidants and reductants. /kloc-in the second half of the 0/8th century, yellow phosphorus was mainly used as an igniter.