def first_recurring_char(s):
array = []
z = str
if type(s) is str and s is not None:
for i in s:
array.append(i)
k = + 1
for j in array[0:k - 1]:
if j == i:
p = +1
print(p)
if p > 1:
z = str(j)
return z
print(first_recurring_char("вадвава"))