Accepted f.ds nicknames:
e: 2.71828........ , 2.71828....... , 2.71828...... , 2.71828..... , 2.71828.... , 2.71828... , 2.71828.. , 2.71828. , 2.71828 , 2.7182........ , 2.7182....... , 2.7182...... , 2.7182..... , 2.7182.... , 2.7182... , 2.7182.. , 2.7182. , 2.7182 , 2.718........ , 2.718....... , 2.718...... , 2.718..... , 2.718.... , 2.718... , 2.718.. , 2.718. , 2.718 , 2.71........ , 2.71....... , 2.71...... , 2.71..... , 2.71.... , 2.71... , 2.71.. , 2.71. , 2.71 , 2.7........ , 2.7....... , 2.7...... , 2.7..... , 2.7.... , 2.7... , 2.7.. , 2.7. , 2.7 , 2,71828....... , 2,71828...... , 2,71828..... , 2,71828.... , 2,71828... , 2,71828.. , 2,71828. , 2,71828 , 2,7182,....... , 2,7182,...... , 2,7182,..... , 2,7182,.... , 2,7182,... , 2,7182,.. , 2,7182,. , 2,7182, , 2,7182 , 2,718........ , 2,718....... , 2,718...... , 2,718..... , 2,718.... , 2,718... , 2,718.. , 2,718. , 2,718 , 2,71........ , 2,71....... , 2,71...... , 2,71..... , 2,71.... , 2,71... , 2,71.. , 2,71. , 2,71 , 2,7........ , 2,7....... , 2,7...... , 2,7..... , 2,7.... , 2,7... , 2,7.. , 2,7. , 2,7