Single words for the concepts of number end at 5. After that, a string of words can express numerals up to 50, but it becomes long and discouraged. 
Examples: 
miph eb pu (five and one), bbhe amipu (two threes), etc. = six
ami eb ami bbhepu eb mi pu (three and three twos and not one)= eleven
miph eb miph miphupu (five and five fives)= fifty