Write $$

$$

$$

$$

python $$

$$

$$

$$

program $$

$$

$$

$$

to $$

$$

$$

$$

count $$

$$

$$

$$

charcharacter $$

$$

$$

$$

freqfrequently $$

$$

$$

$$

along $$

$$

$$

$$

with $$

$$

$$

$$

characharacters $$

$$

$$

$.$

$$

$$

If $$

$$

$$

frequency $$

$$

$$

of $$

$$

$$

charcharacter $$

$$

$$

is $$

$$

$$

$1$

$$

$,$

$$

$$

Then $$

$$

only $$

$$

shows $$

$$

character $$

$$

without $$

$$

freqfrequency $$

$$

$.$

$$

Input $$

$$

$$

$$

: $$

$$

$$

$$

HHOOCHH

Output : H$2+$O$2+$C$+$H$2$