def solve(data):
newString1 = ''
newString2 = ''
data_reverse = data[::-1]
for i in range(len(data_reverse)):
if data_reverse[i] == '.':
break
newString1 = newString1 + data_reverse[i]
newString1 = '.' + newString1
newString2 = data[0:len(data)-len(newString1)]
return newString2
def main():
input_data1 = 'maria.data.mp9'
input_data2 = '....slsslslsls...sls'
print(solve(input_data1))
print(solve(input_data2))
if __name__ == "__main__":
main()