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Wall for nikunj
for virtual memory :
(b) Set of all languages over ΣΣ is uncountable.
TM 2017 set 1 hint
i) repeat(L) is non regular
ii) prefix(L) is regular
iii) suffix(L) is regular
(iv) Half(L) is regular
Sometimes in life, we feel so blue,
But someone somewhere is not happy as you.
Somewhere far at the border when a soldier sleeps,
Missing his loved ones, he silently weeps.
Somewhere fired from job, when a father comes home,
In the heart of family, he painfully felt alone.
Somewhere a mother painfully sighs,
Because her new born baby didn’t open his eyes.
Somewhere in the sky when a star dint broke,
A wish is left frustrated, unfulfilled and knock.
Somewhere a poor dad silently cries,
When he saw his son begging for a bowl of rice.
Somewhere in a fair, a brother cries and shout,
When his sister get lost in a pathetic crowd.
Somewhere in an orphanage a little girl is sad,
When she misses her mom and dad.
So at times, a reason to smile you may not have any,
Tell yourself that you are happier than many.
Because life is beautiful and it’s not always blue,
And someone somewhere is not as happy as you.