Update main.py

main.py

@@ -22,13 +22,13 @@ chemistry_chapters = {
     "some basic concepts in chemistry", "atomic structure", "chemical bonding and molecular structure",
     "chemical thermodynamics", "solutions", "equilibrium", "redox reactions and electrochemistry",
     "chemical kinetics", "classifications of elements and periodicity in properties", "p- block elements",
-    "d - and f - block elements", "c-ordination compounds", "purification and characterisation of organic compounds",
+    "d - and f - block elements", "co-ordination compounds", "purification and characterisation of organic compounds",
     "some basic principles of organic chemistry", "hydrocarbons", "organic compounds containing halogens",
     "organic compounds containing oxygen", "organic compounds containing nitrogen", "biomolecules"
 }
 
 maths_chapters = {
-    "sets, relations and functions", "complex numbers and quadratic equations", "matrices and determinants",
+    "sets, relation and functions", "complex numbers and quadratic equations", "matrices and determinants",
     "permutations and combinations", "binomial theorem", "sequence and series", "limits, continuity, and diffrentiability",
     "integral calculus", "diffrential equations", "co-ordinate geometry", "straight lines", "circle and conic sections",
     "three dimensional geometry", "vector algebra", "statistics and probability", "trigonometry"