#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
I2xpc3QgYQphID0gWydweXRob24nLCAnYysrJywgJ2MjJywgJ2MtcGx1cy1wbHVzJywgJ2Mtc2hhcnAnLCAnY3NoYXJwJywgJ2NwbHVzJ10KCiMgbGlzdCBiIApiID0gWydjKysnLCAnYy1wbHVzLXBsdXMnLCAnY3BsdXMnLCAnYy1wbHVzcGx1cycsICdjcGx1c3BsdXMnXQoKYyA9IFsnYyMnLCAnYy1zaGFycCcsICdjc2hhcnAnXQoKYSA9IFsnY3BsdXNwbHVzJyBpZiBpIGluIGIgZWxzZSBpIGZvciBpIGluIGFdCmEgPSBbJ2NzaGFycCcgaWYgaSBpbiBjIGVsc2UgaSBmb3IgaSBpbiBhXQoKcHJpbnQgYQ==