little help in C language

Find the number of selected letters present in a user input string. Specifically, the number of the occurrences of the letters K$,$ N$,$ I, G$,$ H$,$ T$,$ and S $($upper and lower cases both to be counted$)$ within an input sentence, and then output the result using the format shown below:

Here is the input: "UCF was originally founded in $1963$ and is the largest university in the country today per enrollment. The College of Engineering and Computer Science $($CECS$)$ hosts an assortment of $17$ Engineering programs for students to choose from. In fact, Computer Engineering ranks fifth place in the top $5$ CECS degrees offered by UCF."

Sample of the output:

K: $1$

N: $26$

I: $17$

G: $11$

H: $7$

T: $20$

S: $17$

Output a histogram of the number of the occurrences of the letters K$,$ N$,$ I, G$,$ H$,$ T$,$ and S within an

input sentence:

K: #

N: ##########################

I: #################

G: ###########

H: #######

T: ####################

S: #################

in C language