E:E1 E2 E3 E4 E5 E6
H:H1 H2 H3 H4 H5 H6
U:U1 U2 U3 U4 U5 G
algebra:algebra linear
all:.*
chemistry:chemistry organic
cs:algo coding infotheory internet logic
lang:lang language
language:lang language
math:algebra analysis arithmetic coding geometry graph infotheory linear logic number proba probability set stat
mathematics:math
maths:math
physics:dynamics electro mechanics physics thermo
proba:proba probability stat
probability:proba
stat:proba probability stat
statistics:stat
