UNDER; 10,6;
UNFILLED; 20;
UNIQUE; 10;
UNIT; 16;
UNITS; 16;
UNLIKELY; 10;
UNTIL; 10,4;
UP; 16,10,4,20,5,9,3;
UPWARDS; 10;
US; 16,11,9;
USB; 3;
USE; 4,10,2,16,15,9,5;
USED; 15,19,16,13,11,10,4,2;
USEFUL; 10,5;
USER; 11;
USING; 10,16,20,19,9,5,4,2;
USUAL; 16;
U’S; 16;