from itertools import chain, zip_longest
string1='aovces'
string2='m o'
interpolation = zip_longest(string1, string2, fillvalue='')
print(''.join(chain(*interpolation)))
ZnJvbSBpdGVydG9vbHMgaW1wb3J0IGNoYWluLCB6aXBfbG9uZ2VzdAoKc3RyaW5nMT0nYW92Y2VzJwpzdHJpbmcyPSdtIG8nCgppbnRlcnBvbGF0aW9uID0gemlwX2xvbmdlc3Qoc3RyaW5nMSwgc3RyaW5nMiwgZmlsbHZhbHVlPScnKQoKcHJpbnQoJycuam9pbihjaGFpbigqaW50ZXJwb2xhdGlvbikpKQ==