#list a
a = ['python', 'c++', 'c#', 'c-plus-plus', 'c-sharp', 'csharp', 'cplus']

# list b 
b = ['c++', 'c-plus-plus', 'cplus', 'c-plusplus', 'cplusplus']

c = ['c#', 'c-sharp', 'csharp']

a = ['cplusplus' if i in b else i for i in a]
a = ['csharp' if i in c else i for i in a]

print a