User has asked me to count the number of r's in strawberry.Let's do a cumulative count.s=0, t=0, r=1, a=0, w=0, b=0, e=0, r=2, r=3, y=4It seems there are 3 r's in strawberry. I notice that there is an r in straw and 2 r's in berry.Since 1+2=3 I am more confident there are 3 r's3