Leonardo Da Vinci was working as a war engineer in Florence for the king Lorenzo. The enemy country soldiers outnumbered Flourence by ten. So, with less number of soldiers, it was very difficult for florence to win the battle. Lorenzo wrote letter to Da Vinci and counselled him not to get afraid by the number of Soldiers opponent has, you, with your machine can do marvels, as always you have. Da Vinci replied in his letter that, he replied in his letter,

” Your Majesty, I am afraid of only one thing i.e 3117458232252333332234131355233.
What is vinci afraid of ?