Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Year | Title | B-side | Mediums | Label (Catalog) |
| --- | --- | --- | --- | --- |
| 1996 | "Broke" | "Whenever I Breathe Out, You Breathe In" (Positive/Negative) | 7" | Sub Pop (SP0338) |
| 1997 | "A Life of Arctic Sounds" | "Medication" | 7" | Suicide Squeeze (SSR001003) |
| 1997 | "Birds vs. Worms" | "Every Penny Fed Car", "Four Fingered Fisherman" | 7" | Hit Or Miss |
| 1998 | "Other People's Lives" | "Grey Ice Water" | 7" | Up Records |
| 1998 | "Never Ending Math Equation" | "Workin' on Leavin' the Livin'" | 7" | Sub Pop (SP0436) |
| 1998 | "Whenever You See Fit" | "Whenever You See Fit (DJ Dynomite D Mix)", "Whenever You See Fit" (Sientific American Mix) | 12", CD | Up Records/Suicide Squeeze |
| 1999 | "Heart Cooks Brain" | "Shit Luck" | 7" | Matador Records |
| 2004 | "Float On" | "I've Got It All (Most)" | 7", CD | Epic (076685) |
| 2004 | "Ocean Breathes Salty" | "Float On (Live Studio)" | CD | Epic |
| 2007 | "Dashboard" | "King Rat" | 7", CD | Epic |
| 2007 | "Missed the Boat" |  | Digital | Epic |
| 2009 | "Satellite Skin" | "Guilty Cocker Spaniels" | 7" | Epic |
| 2009 | "Autumn Beds" | "Whale Song" | 7" | Epic |
| 2009 | "Perpetual Motion Machine" | "History Sticks To Your Feet" | 7" | Epic |
Question:
how many modest mouse singles start with the letter "b"?
Answer:
2