from math import *
functions = { 'fabrate': sqrt,
'ensalex': atan,
'fallocest': cos,
'sploop': sin,
'strustate': gamma,
'holofy': exp,
'quendle': erf,
'tudefy': log10,
'chaness': fabs
}
def f(x):
return eval(x,functions)
str = input()
print('{0:.15f}'.format(f(str)))
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